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Message-ID: <20180805164004.GD55836@jaegeuk-macbookpro.roam.corp.google.com>
Date: Sun, 5 Aug 2018 09:40:04 -0700
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: Chao Yu <chao@...nel.org>
Cc: linux-kernel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH] f2fs: fix to do sanity check with block
address in main area v2
On 08/05, Chao Yu wrote:
> Hi Jaegeuk,
>
> Missing this patch in your tree?
Merged.
>
> Thanks,
>
> On 2018/7/10 23:01, Chao Yu wrote:
> > From: Chao Yu <yuchao0@...wei.com>
> >
> > This patch adds f2fs_is_valid_blkaddr() in below functions to do sanity
> > check with block address to avoid pentential panic:
> > - f2fs_grab_read_bio()
> > - __written_first_block()
> >
> > https://bugzilla.kernel.org/show_bug.cgi?id=200465
> >
> > - Reproduce
> >
> > - POC (poc.c)
> > #define _GNU_SOURCE
> > #include <sys/types.h>
> > #include <sys/mount.h>
> > #include <sys/mman.h>
> > #include <sys/stat.h>
> > #include <sys/xattr.h>
> >
> > #include <dirent.h>
> > #include <errno.h>
> > #include <error.h>
> > #include <fcntl.h>
> > #include <stdio.h>
> > #include <stdlib.h>
> > #include <string.h>
> > #include <unistd.h>
> >
> > #include <linux/falloc.h>
> > #include <linux/loop.h>
> >
> > static void activity(char *mpoint) {
> >
> > char *xattr;
> > int err;
> >
> > err = asprintf(&xattr, "%s/foo/bar/xattr", mpoint);
> >
> > char buf2[113];
> > memset(buf2, 0, sizeof(buf2));
> > listxattr(xattr, buf2, sizeof(buf2));
> >
> > }
> >
> > int main(int argc, char *argv[]) {
> > activity(argv[1]);
> > return 0;
> > }
> >
> > - kernel message
> > [ 844.718738] F2FS-fs (loop0): Mounted with checkpoint version = 2
> > [ 846.430929] F2FS-fs (loop0): access invalid blkaddr:1024
> > [ 846.431058] WARNING: CPU: 1 PID: 1249 at fs/f2fs/checkpoint.c:154 f2fs_is_valid_blkaddr+0x10f/0x160
> > [ 846.431059] Modules linked in: snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd input_leds joydev soundcore serio_raw i2c_piix4 mac_hid ib_iser rdma_cm iw_cm ib_cm ib_core configfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 raid10 raid456 libcrc32c async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq raid1 raid0 multipath linear qxl ttm crct10dif_pclmul crc32_pclmul drm_kms_helper ghash_clmulni_intel syscopyarea sysfillrect sysimgblt fb_sys_fops pcbc drm 8139too aesni_intel 8139cp floppy psmouse mii aes_x86_64 crypto_simd pata_acpi cryptd glue_helper
> > [ 846.431310] CPU: 1 PID: 1249 Comm: a.out Not tainted 4.18.0-rc3+ #1
> > [ 846.431312] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
> > [ 846.431315] RIP: 0010:f2fs_is_valid_blkaddr+0x10f/0x160
> > [ 846.431316] Code: 00 eb ed 31 c0 83 fa 05 75 ae 48 83 ec 08 48 8b 3f 89 f1 48 c7 c2 fc 0b 0f 8b 48 c7 c6 8b d7 09 8b 88 44 24 07 e8 61 8b ff ff <0f> 0b 0f b6 44 24 07 48 83 c4 08 eb 81 4c 8b 47 10 8b 8f 38 04 00
> > [ 846.431347] RSP: 0018:ffff961c414a7bc0 EFLAGS: 00010282
> > [ 846.431349] RAX: 0000000000000000 RBX: ffffc5f787b8ea80 RCX: 0000000000000000
> > [ 846.431350] RDX: 0000000000000000 RSI: ffff89dfffd165d8 RDI: ffff89dfffd165d8
> > [ 846.431351] RBP: ffff961c414a7c20 R08: 0000000000000001 R09: 0000000000000248
> > [ 846.431353] R10: 0000000000000000 R11: 0000000000000248 R12: 0000000000000007
> > [ 846.431369] R13: ffff89dff5492800 R14: ffff89dfae3aa000 R15: ffff89dff4ff88d0
> > [ 846.431372] FS: 00007f882e2fb700(0000) GS:ffff89dfffd00000(0000) knlGS:0000000000000000
> > [ 846.431373] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > [ 846.431374] CR2: 0000000001a88008 CR3: 00000001eb572000 CR4: 00000000000006e0
> > [ 846.431384] Call Trace:
> > [ 846.431426] f2fs_iget+0x6f4/0xe70
> > [ 846.431430] ? f2fs_find_entry+0x71/0x90
> > [ 846.431432] f2fs_lookup+0x1aa/0x390
> > [ 846.431452] __lookup_slow+0x97/0x150
> > [ 846.431459] lookup_slow+0x35/0x50
> > [ 846.431462] walk_component+0x1c6/0x470
> > [ 846.431479] ? memcg_kmem_charge_memcg+0x70/0x90
> > [ 846.431488] ? page_add_file_rmap+0x13/0x200
> > [ 846.431491] path_lookupat+0x76/0x230
> > [ 846.431501] ? __alloc_pages_nodemask+0xfc/0x280
> > [ 846.431504] filename_lookup+0xb8/0x1a0
> > [ 846.431534] ? _cond_resched+0x16/0x40
> > [ 846.431541] ? kmem_cache_alloc+0x160/0x1d0
> > [ 846.431549] ? path_listxattr+0x41/0xa0
> > [ 846.431551] path_listxattr+0x41/0xa0
> > [ 846.431570] do_syscall_64+0x55/0x100
> > [ 846.431583] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> > [ 846.431607] RIP: 0033:0x7f882de1c0d7
> > [ 846.431607] Code: f0 ff ff 73 01 c3 48 8b 0d be dd 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 c2 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 dd 2b 00 f7 d8 64 89 01 48
> > [ 846.431639] RSP: 002b:00007ffe8e66c238 EFLAGS: 00000202 ORIG_RAX: 00000000000000c2
> > [ 846.431641] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f882de1c0d7
> > [ 846.431642] RDX: 0000000000000071 RSI: 00007ffe8e66c280 RDI: 0000000001a880c0
> > [ 846.431643] RBP: 00007ffe8e66c300 R08: 0000000001a88010 R09: 0000000000000000
> > [ 846.431645] R10: 00000000000001ab R11: 0000000000000202 R12: 0000000000400550
> > [ 846.431646] R13: 00007ffe8e66c400 R14: 0000000000000000 R15: 0000000000000000
> > [ 846.431648] ---[ end trace abca54df39d14f5c ]---
> > [ 846.431651] F2FS-fs (loop0): invalid blkaddr: 1024, type: 5, run fsck to fix.
> > [ 846.431762] WARNING: CPU: 1 PID: 1249 at fs/f2fs/f2fs.h:2697 f2fs_iget+0xd17/0xe70
> > [ 846.431763] Modules linked in: snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd input_leds joydev soundcore serio_raw i2c_piix4 mac_hid ib_iser rdma_cm iw_cm ib_cm ib_core configfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 raid10 raid456 libcrc32c async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq raid1 raid0 multipath linear qxl ttm crct10dif_pclmul crc32_pclmul drm_kms_helper ghash_clmulni_intel syscopyarea sysfillrect sysimgblt fb_sys_fops pcbc drm 8139too aesni_intel 8139cp floppy psmouse mii aes_x86_64 crypto_simd pata_acpi cryptd glue_helper
> > [ 846.431797] CPU: 1 PID: 1249 Comm: a.out Tainted: G W 4.18.0-rc3+ #1
> > [ 846.431798] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
> > [ 846.431800] RIP: 0010:f2fs_iget+0xd17/0xe70
> > [ 846.431801] Code: ff ff 48 63 d8 e9 e1 f6 ff ff 48 8b 45 c8 41 b8 05 00 00 00 48 c7 c2 d8 e8 0e 8b 48 c7 c6 1d b0 0a 8b 48 8b 38 e8 f9 b4 00 00 <0f> 0b 48 8b 45 c8 f0 80 48 48 04 e9 d8 f9 ff ff 0f 0b 48 8b 43 18
> > [ 846.431832] RSP: 0018:ffff961c414a7bd0 EFLAGS: 00010282
> > [ 846.431834] RAX: 0000000000000000 RBX: ffffc5f787b8ea80 RCX: 0000000000000006
> > [ 846.431835] RDX: 0000000000000000 RSI: 0000000000000096 RDI: ffff89dfffd165d0
> > [ 846.431836] RBP: ffff961c414a7c20 R08: 0000000000000000 R09: 0000000000000273
> > [ 846.431837] R10: 0000000000000000 R11: ffff89dfad50ca60 R12: 0000000000000007
> > [ 846.431838] R13: ffff89dff5492800 R14: ffff89dfae3aa000 R15: ffff89dff4ff88d0
> > [ 846.431840] FS: 00007f882e2fb700(0000) GS:ffff89dfffd00000(0000) knlGS:0000000000000000
> > [ 846.431841] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > [ 846.431842] CR2: 0000000001a88008 CR3: 00000001eb572000 CR4: 00000000000006e0
> > [ 846.431846] Call Trace:
> > [ 846.431850] ? f2fs_find_entry+0x71/0x90
> > [ 846.431853] f2fs_lookup+0x1aa/0x390
> > [ 846.431856] __lookup_slow+0x97/0x150
> > [ 846.431858] lookup_slow+0x35/0x50
> > [ 846.431874] walk_component+0x1c6/0x470
> > [ 846.431878] ? memcg_kmem_charge_memcg+0x70/0x90
> > [ 846.431880] ? page_add_file_rmap+0x13/0x200
> > [ 846.431882] path_lookupat+0x76/0x230
> > [ 846.431884] ? __alloc_pages_nodemask+0xfc/0x280
> > [ 846.431886] filename_lookup+0xb8/0x1a0
> > [ 846.431890] ? _cond_resched+0x16/0x40
> > [ 846.431891] ? kmem_cache_alloc+0x160/0x1d0
> > [ 846.431894] ? path_listxattr+0x41/0xa0
> > [ 846.431896] path_listxattr+0x41/0xa0
> > [ 846.431898] do_syscall_64+0x55/0x100
> > [ 846.431901] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> > [ 846.431902] RIP: 0033:0x7f882de1c0d7
> > [ 846.431903] Code: f0 ff ff 73 01 c3 48 8b 0d be dd 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 c2 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 dd 2b 00 f7 d8 64 89 01 48
> > [ 846.431934] RSP: 002b:00007ffe8e66c238 EFLAGS: 00000202 ORIG_RAX: 00000000000000c2
> > [ 846.431936] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f882de1c0d7
> > [ 846.431937] RDX: 0000000000000071 RSI: 00007ffe8e66c280 RDI: 0000000001a880c0
> > [ 846.431939] RBP: 00007ffe8e66c300 R08: 0000000001a88010 R09: 0000000000000000
> > [ 846.431940] R10: 00000000000001ab R11: 0000000000000202 R12: 0000000000400550
> > [ 846.431941] R13: 00007ffe8e66c400 R14: 0000000000000000 R15: 0000000000000000
> > [ 846.431943] ---[ end trace abca54df39d14f5d ]---
> > [ 846.432033] F2FS-fs (loop0): access invalid blkaddr:1024
> > [ 846.432051] WARNING: CPU: 1 PID: 1249 at fs/f2fs/checkpoint.c:154 f2fs_is_valid_blkaddr+0x10f/0x160
> > [ 846.432051] Modules linked in: snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd input_leds joydev soundcore serio_raw i2c_piix4 mac_hid ib_iser rdma_cm iw_cm ib_cm ib_core configfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 raid10 raid456 libcrc32c async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq raid1 raid0 multipath linear qxl ttm crct10dif_pclmul crc32_pclmul drm_kms_helper ghash_clmulni_intel syscopyarea sysfillrect sysimgblt fb_sys_fops pcbc drm 8139too aesni_intel 8139cp floppy psmouse mii aes_x86_64 crypto_simd pata_acpi cryptd glue_helper
> > [ 846.432085] CPU: 1 PID: 1249 Comm: a.out Tainted: G W 4.18.0-rc3+ #1
> > [ 846.432086] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
> > [ 846.432089] RIP: 0010:f2fs_is_valid_blkaddr+0x10f/0x160
> > [ 846.432089] Code: 00 eb ed 31 c0 83 fa 05 75 ae 48 83 ec 08 48 8b 3f 89 f1 48 c7 c2 fc 0b 0f 8b 48 c7 c6 8b d7 09 8b 88 44 24 07 e8 61 8b ff ff <0f> 0b 0f b6 44 24 07 48 83 c4 08 eb 81 4c 8b 47 10 8b 8f 38 04 00
> > [ 846.432120] RSP: 0018:ffff961c414a7900 EFLAGS: 00010286
> > [ 846.432122] RAX: 0000000000000000 RBX: 0000000000000400 RCX: 0000000000000006
> > [ 846.432123] RDX: 0000000000000000 RSI: 0000000000000096 RDI: ffff89dfffd165d0
> > [ 846.432124] RBP: ffff89dff5492800 R08: 0000000000000001 R09: 000000000000029d
> > [ 846.432125] R10: ffff961c414a7820 R11: 000000000000029d R12: 0000000000000400
> > [ 846.432126] R13: 0000000000000000 R14: ffff89dff4ff88d0 R15: 0000000000000000
> > [ 846.432128] FS: 00007f882e2fb700(0000) GS:ffff89dfffd00000(0000) knlGS:0000000000000000
> > [ 846.432130] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > [ 846.432131] CR2: 0000000001a88008 CR3: 00000001eb572000 CR4: 00000000000006e0
> > [ 846.432135] Call Trace:
> > [ 846.432151] f2fs_wait_on_block_writeback+0x20/0x110
> > [ 846.432158] f2fs_grab_read_bio+0xbc/0xe0
> > [ 846.432161] f2fs_submit_page_read+0x21/0x280
> > [ 846.432163] f2fs_get_read_data_page+0xb7/0x3c0
> > [ 846.432165] f2fs_get_lock_data_page+0x29/0x1e0
> > [ 846.432167] f2fs_get_new_data_page+0x148/0x550
> > [ 846.432170] f2fs_add_regular_entry+0x1d2/0x550
> > [ 846.432178] ? __switch_to+0x12f/0x460
> > [ 846.432181] f2fs_add_dentry+0x6a/0xd0
> > [ 846.432184] f2fs_do_add_link+0xe9/0x140
> > [ 846.432186] __recover_dot_dentries+0x260/0x280
> > [ 846.432189] f2fs_lookup+0x343/0x390
> > [ 846.432193] __lookup_slow+0x97/0x150
> > [ 846.432195] lookup_slow+0x35/0x50
> > [ 846.432208] walk_component+0x1c6/0x470
> > [ 846.432212] ? memcg_kmem_charge_memcg+0x70/0x90
> > [ 846.432215] ? page_add_file_rmap+0x13/0x200
> > [ 846.432217] path_lookupat+0x76/0x230
> > [ 846.432219] ? __alloc_pages_nodemask+0xfc/0x280
> > [ 846.432221] filename_lookup+0xb8/0x1a0
> > [ 846.432224] ? _cond_resched+0x16/0x40
> > [ 846.432226] ? kmem_cache_alloc+0x160/0x1d0
> > [ 846.432228] ? path_listxattr+0x41/0xa0
> > [ 846.432230] path_listxattr+0x41/0xa0
> > [ 846.432233] do_syscall_64+0x55/0x100
> > [ 846.432235] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> > [ 846.432237] RIP: 0033:0x7f882de1c0d7
> > [ 846.432237] Code: f0 ff ff 73 01 c3 48 8b 0d be dd 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 c2 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 dd 2b 00 f7 d8 64 89 01 48
> > [ 846.432269] RSP: 002b:00007ffe8e66c238 EFLAGS: 00000202 ORIG_RAX: 00000000000000c2
> > [ 846.432271] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f882de1c0d7
> > [ 846.432272] RDX: 0000000000000071 RSI: 00007ffe8e66c280 RDI: 0000000001a880c0
> > [ 846.432273] RBP: 00007ffe8e66c300 R08: 0000000001a88010 R09: 0000000000000000
> > [ 846.432274] R10: 00000000000001ab R11: 0000000000000202 R12: 0000000000400550
> > [ 846.432275] R13: 00007ffe8e66c400 R14: 0000000000000000 R15: 0000000000000000
> > [ 846.432277] ---[ end trace abca54df39d14f5e ]---
> > [ 846.432279] F2FS-fs (loop0): invalid blkaddr: 1024, type: 5, run fsck to fix.
> > [ 846.432376] WARNING: CPU: 1 PID: 1249 at fs/f2fs/f2fs.h:2697 f2fs_wait_on_block_writeback+0xb1/0x110
> > [ 846.432376] Modules linked in: snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd input_leds joydev soundcore serio_raw i2c_piix4 mac_hid ib_iser rdma_cm iw_cm ib_cm ib_core configfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 raid10 raid456 libcrc32c async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq raid1 raid0 multipath linear qxl ttm crct10dif_pclmul crc32_pclmul drm_kms_helper ghash_clmulni_intel syscopyarea sysfillrect sysimgblt fb_sys_fops pcbc drm 8139too aesni_intel 8139cp floppy psmouse mii aes_x86_64 crypto_simd pata_acpi cryptd glue_helper
> > [ 846.432410] CPU: 1 PID: 1249 Comm: a.out Tainted: G W 4.18.0-rc3+ #1
> > [ 846.432411] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
> > [ 846.432413] RIP: 0010:f2fs_wait_on_block_writeback+0xb1/0x110
> > [ 846.432414] Code: 66 90 f0 ff 4b 34 74 59 5b 5d c3 48 8b 7d 00 41 b8 05 00 00 00 89 d9 48 c7 c2 d8 e8 0e 8b 48 c7 c6 1d b0 0a 8b e8 df bc fd ff <0f> 0b f0 80 4d 48 04 e9 67 ff ff ff 48 8b 03 48 c1 e8 37 83 e0 07
> > [ 846.432445] RSP: 0018:ffff961c414a7910 EFLAGS: 00010286
> > [ 846.432447] RAX: 0000000000000000 RBX: 0000000000000400 RCX: 0000000000000006
> > [ 846.432448] RDX: 0000000000000000 RSI: 0000000000000092 RDI: ffff89dfffd165d0
> > [ 846.432449] RBP: ffff89dff5492800 R08: 0000000000000000 R09: 00000000000002d1
> > [ 846.432450] R10: ffff961c414a7820 R11: ffff89dfad50cf80 R12: 0000000000000400
> > [ 846.432451] R13: 0000000000000000 R14: ffff89dff4ff88d0 R15: 0000000000000000
> > [ 846.432453] FS: 00007f882e2fb700(0000) GS:ffff89dfffd00000(0000) knlGS:0000000000000000
> > [ 846.432454] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > [ 846.432455] CR2: 0000000001a88008 CR3: 00000001eb572000 CR4: 00000000000006e0
> > [ 846.432459] Call Trace:
> > [ 846.432463] f2fs_grab_read_bio+0xbc/0xe0
> > [ 846.432464] f2fs_submit_page_read+0x21/0x280
> > [ 846.432466] f2fs_get_read_data_page+0xb7/0x3c0
> > [ 846.432468] f2fs_get_lock_data_page+0x29/0x1e0
> > [ 846.432470] f2fs_get_new_data_page+0x148/0x550
> > [ 846.432473] f2fs_add_regular_entry+0x1d2/0x550
> > [ 846.432475] ? __switch_to+0x12f/0x460
> > [ 846.432477] f2fs_add_dentry+0x6a/0xd0
> > [ 846.432480] f2fs_do_add_link+0xe9/0x140
> > [ 846.432483] __recover_dot_dentries+0x260/0x280
> > [ 846.432485] f2fs_lookup+0x343/0x390
> > [ 846.432488] __lookup_slow+0x97/0x150
> > [ 846.432490] lookup_slow+0x35/0x50
> > [ 846.432505] walk_component+0x1c6/0x470
> > [ 846.432509] ? memcg_kmem_charge_memcg+0x70/0x90
> > [ 846.432511] ? page_add_file_rmap+0x13/0x200
> > [ 846.432513] path_lookupat+0x76/0x230
> > [ 846.432515] ? __alloc_pages_nodemask+0xfc/0x280
> > [ 846.432517] filename_lookup+0xb8/0x1a0
> > [ 846.432520] ? _cond_resched+0x16/0x40
> > [ 846.432522] ? kmem_cache_alloc+0x160/0x1d0
> > [ 846.432525] ? path_listxattr+0x41/0xa0
> > [ 846.432526] path_listxattr+0x41/0xa0
> > [ 846.432529] do_syscall_64+0x55/0x100
> > [ 846.432531] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> > [ 846.432533] RIP: 0033:0x7f882de1c0d7
> > [ 846.432533] Code: f0 ff ff 73 01 c3 48 8b 0d be dd 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 c2 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 dd 2b 00 f7 d8 64 89 01 48
> > [ 846.432565] RSP: 002b:00007ffe8e66c238 EFLAGS: 00000202 ORIG_RAX: 00000000000000c2
> > [ 846.432567] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f882de1c0d7
> > [ 846.432568] RDX: 0000000000000071 RSI: 00007ffe8e66c280 RDI: 0000000001a880c0
> > [ 846.432569] RBP: 00007ffe8e66c300 R08: 0000000001a88010 R09: 0000000000000000
> > [ 846.432570] R10: 00000000000001ab R11: 0000000000000202 R12: 0000000000400550
> > [ 846.432571] R13: 00007ffe8e66c400 R14: 0000000000000000 R15: 0000000000000000
> > [ 846.432573] ---[ end trace abca54df39d14f5f ]---
> > [ 846.434280] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
> > [ 846.434424] PGD 80000001ebd3a067 P4D 80000001ebd3a067 PUD 1eb1ae067 PMD 0
> > [ 846.434551] Oops: 0000 [#1] SMP PTI
> > [ 846.434697] CPU: 0 PID: 44 Comm: kworker/u5:0 Tainted: G W 4.18.0-rc3+ #1
> > [ 846.434805] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
> > [ 846.435000] Workqueue: fscrypt_read_queue decrypt_work
> > [ 846.435174] RIP: 0010:fscrypt_do_page_crypto+0x6e/0x2d0
> > [ 846.435351] Code: 00 65 48 8b 04 25 28 00 00 00 48 89 84 24 88 00 00 00 31 c0 e8 43 c2 e0 ff 49 8b 86 48 02 00 00 85 ed c7 44 24 70 00 00 00 00 <48> 8b 58 08 0f 84 14 02 00 00 48 8b 78 10 48 8b 0c 24 48 c7 84 24
> > [ 846.435696] RSP: 0018:ffff961c40f9bd60 EFLAGS: 00010206
> > [ 846.435870] RAX: 0000000000000000 RBX: ffffc5f787719b80 RCX: ffffc5f787719b80
> > [ 846.436051] RDX: ffffffff8b9f4b88 RSI: ffffffff8b0ae622 RDI: ffff961c40f9bdb8
> > [ 846.436261] RBP: 0000000000001000 R08: ffffc5f787719b80 R09: 0000000000001000
> > [ 846.436433] R10: 0000000000000018 R11: fefefefefefefeff R12: ffffc5f787719b80
> > [ 846.436562] R13: ffffc5f787719b80 R14: ffff89dff4ff88d0 R15: 0ffff89dfaddee60
> > [ 846.436658] FS: 0000000000000000(0000) GS:ffff89dfffc00000(0000) knlGS:0000000000000000
> > [ 846.436758] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > [ 846.436898] CR2: 0000000000000008 CR3: 00000001eddd0000 CR4: 00000000000006f0
> > [ 846.437001] Call Trace:
> > [ 846.437181] ? check_preempt_wakeup+0xf2/0x230
> > [ 846.437276] ? check_preempt_curr+0x7c/0x90
> > [ 846.437370] fscrypt_decrypt_page+0x48/0x4d
> > [ 846.437466] __fscrypt_decrypt_bio+0x5b/0x90
> > [ 846.437542] decrypt_work+0x12/0x20
> > [ 846.437651] process_one_work+0x15e/0x3d0
> > [ 846.437740] worker_thread+0x4c/0x440
> > [ 846.437848] kthread+0xf8/0x130
> > [ 846.437938] ? rescuer_thread+0x350/0x350
> > [ 846.438022] ? kthread_associate_blkcg+0x90/0x90
> > [ 846.438117] ret_from_fork+0x35/0x40
> > [ 846.438201] Modules linked in: snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd input_leds joydev soundcore serio_raw i2c_piix4 mac_hid ib_iser rdma_cm iw_cm ib_cm ib_core configfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 raid10 raid456 libcrc32c async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq raid1 raid0 multipath linear qxl ttm crct10dif_pclmul crc32_pclmul drm_kms_helper ghash_clmulni_intel syscopyarea sysfillrect sysimgblt fb_sys_fops pcbc drm 8139too aesni_intel 8139cp floppy psmouse mii aes_x86_64 crypto_simd pata_acpi cryptd glue_helper
> > [ 846.438653] CR2: 0000000000000008
> > [ 846.438713] ---[ end trace abca54df39d14f60 ]---
> > [ 846.438796] RIP: 0010:fscrypt_do_page_crypto+0x6e/0x2d0
> > [ 846.438844] Code: 00 65 48 8b 04 25 28 00 00 00 48 89 84 24 88 00 00 00 31 c0 e8 43 c2 e0 ff 49 8b 86 48 02 00 00 85 ed c7 44 24 70 00 00 00 00 <48> 8b 58 08 0f 84 14 02 00 00 48 8b 78 10 48 8b 0c 24 48 c7 84 24
> > [ 846.439084] RSP: 0018:ffff961c40f9bd60 EFLAGS: 00010206
> > [ 846.439176] RAX: 0000000000000000 RBX: ffffc5f787719b80 RCX: ffffc5f787719b80
> > [ 846.440927] RDX: ffffffff8b9f4b88 RSI: ffffffff8b0ae622 RDI: ffff961c40f9bdb8
> > [ 846.442083] RBP: 0000000000001000 R08: ffffc5f787719b80 R09: 0000000000001000
> > [ 846.443284] R10: 0000000000000018 R11: fefefefefefefeff R12: ffffc5f787719b80
> > [ 846.444448] R13: ffffc5f787719b80 R14: ffff89dff4ff88d0 R15: 0ffff89dfaddee60
> > [ 846.445558] FS: 0000000000000000(0000) GS:ffff89dfffc00000(0000) knlGS:0000000000000000
> > [ 846.446687] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > [ 846.447796] CR2: 0000000000000008 CR3: 00000001eddd0000 CR4: 00000000000006f0
> >
> > - Location
> > https://elixir.bootlin.com/linux/v4.18-rc4/source/fs/crypto/crypto.c#L149
> > struct crypto_skcipher *tfm = ci->ci_ctfm;
> > Here ci can be NULL
> >
> > Note that this issue maybe require CONFIG_F2FS_FS_ENCRYPTION=y to reproduce.
> >
> > Reported-by Wen Xu <wen.xu@...ech.edu>
> > Signed-off-by: Chao Yu <yuchao0@...wei.com>
> > ---
> > fs/f2fs/data.c | 3 +++
> > fs/f2fs/inode.c | 18 +++++++++++++-----
> > 2 files changed, 16 insertions(+), 5 deletions(-)
> >
> > diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> > index afe76d87575c..89e8fa7aeb20 100644
> > --- a/fs/f2fs/data.c
> > +++ b/fs/f2fs/data.c
> > @@ -545,6 +545,9 @@ static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
> > struct bio_post_read_ctx *ctx;
> > unsigned int post_read_steps = 0;
> >
> > + if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC))
> > + return ERR_PTR(-EFAULT);
> > +
> > bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES), false);
> > if (!bio)
> > return ERR_PTR(-ENOMEM);
> > diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
> > index 6e661445ddd6..50a9e279dfed 100644
> > --- a/fs/f2fs/inode.c
> > +++ b/fs/f2fs/inode.c
> > @@ -68,14 +68,16 @@ static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
> > }
> > }
> >
> > -static bool __written_first_block(struct f2fs_sb_info *sbi,
> > +static int __written_first_block(struct f2fs_sb_info *sbi,
> > struct f2fs_inode *ri)
> > {
> > block_t addr = le32_to_cpu(ri->i_addr[offset_in_addr(ri)]);
> >
> > - if (is_valid_data_blkaddr(sbi, addr))
> > - return true;
> > - return false;
> > + if (!__is_valid_data_blkaddr(addr))
> > + return 1;
> > + if (!f2fs_is_valid_blkaddr(sbi, addr, DATA_GENERIC))
> > + return -EFAULT;
> > + return 0;
> > }
> >
> > static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
> > @@ -295,6 +297,7 @@ static int do_read_inode(struct inode *inode)
> > struct page *node_page;
> > struct f2fs_inode *ri;
> > projid_t i_projid;
> > + int err;
> >
> > /* Check if ino is within scope */
> > if (f2fs_check_nid_range(sbi, inode->i_ino))
> > @@ -368,7 +371,12 @@ static int do_read_inode(struct inode *inode)
> > /* get rdev by using inline_info */
> > __get_inode_rdev(inode, ri);
> >
> > - if (__written_first_block(sbi, ri))
> > + err = __written_first_block(sbi, ri);
> > + if (err < 0) {
> > + f2fs_put_page(node_page, 1);
> > + return err;
> > + }
> > + if (!err)
> > set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
> >
> > if (!f2fs_need_inode_block_update(sbi, inode->i_ino))
> >
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