Message-ID: <67801a71.050a0220.25a300.01cb.GAE@google.com>
Date: Thu, 09 Jan 2025 10:50:25 -0800
From: syzbot <syzbot+c6e047750c7e8603508b@...kaller.appspotmail.com>
To: axboe@...nel.dk, jack@...e.com, linux-block@...r.kernel.org, 
	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [ext4?] [udf?] [block?] kernel BUG in set_blocksize (2)

Hello,

syzbot found the following issue on:

HEAD commit:    ab75170520d4 Merge tag 'linux-watchdog-6.13-rc6' of git://..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1178d418580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ba7cde9482d6bb6
dashboard link: https://syzkaller.appspot.com/bug?extid=c6e047750c7e8603508b
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11556edf980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/205ade41622a/disk-ab751705.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/39aa1b893dfc/vmlinux-ab751705.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c741f4e4b082/bzImage-ab751705.xz
mounted in repro #1: https://storage.googleapis.com/syzbot-assets/512e46aed82f/mount_0.gz
mounted in repro #2: https://storage.googleapis.com/syzbot-assets/1952d0d2f4a4/mount_3.gz
mounted in repro #3: https://storage.googleapis.com/syzbot-assets/dc175c44b2d4/mount_7.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c6e047750c7e8603508b@...kaller.appspotmail.com

 folios_put_refs+0x76c/0x860 mm/swap.c:962
 free_pages_and_swap_cache+0x2ea/0x690 mm/swap_state.c:332
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
 tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373
 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465
 exit_mmap+0x496/0xc20 mm/mmap.c:1681
 __mmput+0x115/0x3b0 kernel/fork.c:1348
 exit_mm+0x220/0x310 kernel/exit.c:570
 do_exit+0x9ad/0x28e0 kernel/exit.c:925
 do_group_exit+0x207/0x2c0 kernel/exit.c:1087
 get_signal+0x16b2/0x1750 kernel/signal.c:3017
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
kernel BUG at mm/filemap.c:2114!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 7712 Comm: syz.3.780 Not tainted 6.13.0-rc5-syzkaller-00163-gab75170520d4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:find_lock_entries+0xb8a/0xbb0 mm/filemap.c:2113
Code: 30 c7 ff 4c 89 ff 48 c7 c6 e0 aa 13 8c e8 5e a8 0e 00 90 0f 0b e8 26 30 c7 ff 4c 89 ff 48 c7 c6 c0 a4 13 8c e8 47 a8 0e 00 90 <0f> 0b e8 0f 30 c7 ff 4c 89 ff 48 c7 c6 a0 ad 13 8c e8 30 a8 0e 00
RSP: 0018:ffffc9000c6f73c0 EFLAGS: 00010246
RAX: dd31507b3d2b8c00 RBX: ffffc9000c6f7840 RCX: ffffc9000c6f6f03
RDX: 0000000000000002 RSI: ffffffff8c0aaae0 RDI: ffffffff8c5edd60
RBP: ffffc9000c6f7510 R08: ffffffff901856b7 R09: 1ffffffff2030ad6
R10: dffffc0000000000 R11: fffffbfff2030ad7 R12: 0000000000000080
R13: 0000000000000001 R14: ffffea0000d32180 R15: ffffea0000d32180
FS:  00007fce2da676c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f78b6e0f000 CR3: 0000000077012000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 truncate_inode_pages_range+0x23b/0x10e0 mm/truncate.c:322
 kill_bdev block/bdev.c:91 [inline]
 set_blocksize+0x2f1/0x360 block/bdev.c:172
 sb_set_blocksize+0x47/0xf0 block/bdev.c:181
 udf_load_vrs+0xe6/0x1130 fs/udf/super.c:1998
 udf_fill_super+0x5eb/0x1ed0 fs/udf/super.c:2192
 get_tree_bdev_flags+0x48c/0x5c0 fs/super.c:1636
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4057 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fce2cb874ca
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fce2da66e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fce2da66ef0 RCX: 00007fce2cb874ca
RDX: 0000000020000c40 RSI: 0000000020000c80 RDI: 00007fce2da66eb0
RBP: 0000000020000c40 R08: 00007fce2da66ef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000c80
R13: 00007fce2da66eb0 R14: 0000000000000c40 R15: 000000002000b240
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:find_lock_entries+0xb8a/0xbb0 mm/filemap.c:2113
Code: 30 c7 ff 4c 89 ff 48 c7 c6 e0 aa 13 8c e8 5e a8 0e 00 90 0f 0b e8 26 30 c7 ff 4c 89 ff 48 c7 c6 c0 a4 13 8c e8 47 a8 0e 00 90 <0f> 0b e8 0f 30 c7 ff 4c 89 ff 48 c7 c6 a0 ad 13 8c e8 30 a8 0e 00
RSP: 0018:ffffc9000c6f73c0 EFLAGS: 00010246
RAX: dd31507b3d2b8c00 RBX: ffffc9000c6f7840 RCX: ffffc9000c6f6f03
RDX: 0000000000000002 RSI: ffffffff8c0aaae0 RDI: ffffffff8c5edd60
RBP: ffffc9000c6f7510 R08: ffffffff901856b7 R09: 1ffffffff2030ad6
R10: dffffc0000000000 R11: fffffbfff2030ad7 R12: 0000000000000080
R13: 0000000000000001 R14: ffffea0000d32180 R15: ffffea0000d32180
FS:  00007fce2da676c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f78b6e0f000 CR3: 0000000077012000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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