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[syzbot] [ext4?] possible deadlock in ext4_readpage_inline | 0 (1) | 2024/12/25 06:58 |
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[syzbot] [ext4?] possible deadlock in ext4_readpage_inline | 0 (1) | 2024/12/25 06:58 |
loop2: detected capacity change from 0 to 1024 EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ====================================================== WARNING: possible circular locking dependency detected 6.13.0-rc7-syzkaller-00209-g9528d418de4d #0 Not tainted ------------------------------------------------------ syz.2.1847/11359 is trying to acquire lock: ffff888078cdedc0 (&ei->xattr_sem){++++}-{4:4}, at: ext4_readpage_inline+0x36/0x590 fs/ext4/inline.c:518 but task is already holding lock: ffff888078cdf290 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:873 [inline] ffff888078cdf290 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_create_folio mm/filemap.c:2479 [inline] ffff888078cdf290 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_get_pages+0xdad/0x2080 mm/filemap.c:2546 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (mapping.invalidate_lock){++++}-{4:4}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524 filemap_invalidate_lock_shared include/linux/fs.h:873 [inline] page_cache_ra_unbounded+0x142/0x720 mm/readahead.c:226 do_async_mmap_readahead mm/filemap.c:3222 [inline] filemap_fault+0x818/0x1490 mm/filemap.c:3321 __do_fault+0x137/0x390 mm/memory.c:4907 do_read_fault mm/memory.c:5322 [inline] do_fault mm/memory.c:5456 [inline] do_pte_missing mm/memory.c:3979 [inline] handle_pte_fault+0x39eb/0x5ed0 mm/memory.c:5801 __handle_mm_fault mm/memory.c:5944 [inline] handle_mm_fault+0x1106/0x1bb0 mm/memory.c:6112 faultin_page mm/gup.c:1196 [inline] __get_user_pages+0x1c82/0x49e0 mm/gup.c:1494 __get_user_pages_locked mm/gup.c:1760 [inline] get_dump_page+0x155/0x2f0 mm/gup.c:2278 dump_user_range+0x14d/0x970 fs/coredump.c:943 elf_core_dump+0x3e9f/0x4790 fs/binfmt_elf.c:2129 do_coredump+0x229d/0x3100 fs/coredump.c:758 get_signal+0x140b/0x1750 kernel/signal.c:3021 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] irqentry_exit_to_user_mode+0x7e/0x250 kernel/entry/common.c:231 exc_page_fault+0x590/0x8b0 arch/x86/mm/fault.c:1542 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 -> #3 (&mm->mmap_lock){++++}-{4:4}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __might_fault+0xc6/0x120 mm/memory.c:6751 _inline_copy_to_user include/linux/uaccess.h:192 [inline] _copy_to_user+0x2c/0xb0 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:225 [inline] fiemap_fill_next_extent+0x235/0x410 fs/ioctl.c:145 ocfs2_fiemap+0x9f1/0xf80 fs/ocfs2/extent_map.c:796 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1c03/0x2e40 fs/ioctl.c:840 __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0x80/0x170 fs/ioctl.c:892 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 -> #2 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_write+0x99/0x220 kernel/locking/rwsem.c:1577 ocfs2_create_local_dquot+0x1de/0x1d70 fs/ocfs2/quota_local.c:1232 ocfs2_acquire_dquot+0x833/0xb70 fs/ocfs2/quota_global.c:878 dqget+0x772/0xeb0 fs/quota/dquot.c:977 __dquot_initialize+0x2e3/0xec0 fs/quota/dquot.c:1505 ocfs2_get_init_inode+0x158/0x1d0 fs/ocfs2/namei.c:202 ocfs2_mknod+0xcfa/0x2b30 fs/ocfs2/namei.c:310 ocfs2_mkdir+0x1ab/0x470 fs/ocfs2/namei.c:657 vfs_mkdir+0x2fb/0x4f0 fs/namei.c:4311 do_mkdirat+0x264/0x3a0 fs/namei.c:4334 __do_sys_mkdirat fs/namei.c:4349 [inline] __se_sys_mkdirat fs/namei.c:4347 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4347 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 -> #1 (&dquot->dq_lock){+.+.}-{4:4}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735 wait_on_dquot fs/quota/dquot.c:354 [inline] dqget+0x6e6/0xeb0 fs/quota/dquot.c:972 dquot_transfer+0x2c2/0x6d0 fs/quota/dquot.c:2140 ext4_setattr+0xb49/0x1da0 fs/ext4/inode.c:5400 notify_change+0xbcc/0xe90 fs/attr.c:552 chown_common+0x501/0x850 fs/open.c:778 do_fchownat+0x16a/0x240 fs/open.c:809 __do_sys_lchown fs/open.c:834 [inline] __se_sys_lchown fs/open.c:832 [inline] __x64_sys_lchown+0x85/0xa0 fs/open.c:832 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 -> #0 (&ei->xattr_sem){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524 ext4_readpage_inline+0x36/0x590 fs/ext4/inline.c:518 ext4_read_folio+0x174/0x340 fs/ext4/inode.c:3185 filemap_read_folio+0x14a/0x3b0 mm/filemap.c:2357 filemap_create_folio mm/filemap.c:2488 [inline] filemap_get_pages+0x1099/0x2080 mm/filemap.c:2546 filemap_read+0x452/0xf50 mm/filemap.c:2637 copy_splice_read+0x665/0xb60 fs/splice.c:365 do_splice_read fs/splice.c:984 [inline] splice_direct_to_actor+0x4fa/0xc80 fs/splice.c:1089 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x289/0x3e0 fs/splice.c:1233 do_sendfile+0x564/0x8a0 fs/read_write.c:1363 __do_sys_sendfile64 fs/read_write.c:1424 [inline] __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1410 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 other info that might help us debug this: Chain exists of: &ei->xattr_sem --> &mm->mmap_lock --> mapping.invalidate_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(mapping.invalidate_lock); lock(&mm->mmap_lock); lock(mapping.invalidate_lock); rlock(&ei->xattr_sem); *** DEADLOCK *** 1 lock held by syz.2.1847/11359: #0: ffff888078cdf290 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:873 [inline] #0: ffff888078cdf290 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_create_folio mm/filemap.c:2479 [inline] #0: ffff888078cdf290 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_get_pages+0xdad/0x2080 mm/filemap.c:2546 stack backtrace: CPU: 1 UID: 0 PID: 11359 Comm: syz.2.1847 Not tainted 6.13.0-rc7-syzkaller-00209-g9528d418de4d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524 ext4_readpage_inline+0x36/0x590 fs/ext4/inline.c:518 ext4_read_folio+0x174/0x340 fs/ext4/inode.c:3185 filemap_read_folio+0x14a/0x3b0 mm/filemap.c:2357 filemap_create_folio mm/filemap.c:2488 [inline] filemap_get_pages+0x1099/0x2080 mm/filemap.c:2546 filemap_read+0x452/0xf50 mm/filemap.c:2637 copy_splice_read+0x665/0xb60 fs/splice.c:365 do_splice_read fs/splice.c:984 [inline] splice_direct_to_actor+0x4fa/0xc80 fs/splice.c:1089 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x289/0x3e0 fs/splice.c:1233 do_sendfile+0x564/0x8a0 fs/read_write.c:1363 __do_sys_sendfile64 fs/read_write.c:1424 [inline] __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1410 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: 0033:0x7f8676b85d29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f8677a36038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f8676d75fa0 RCX: 00007f8676b85d29 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 RBP: 00007f8676c01b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8676d75fa0 R15: 00007ffd5894cd68 </TASK>
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2025/01/19 21:41 | upstream | 9528d418de4d | f2cb035c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | possible deadlock in ext4_readpage_inline | ||
2025/01/05 02:33 | upstream | ab75170520d4 | f3558dbf | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | possible deadlock in ext4_readpage_inline | ||
2025/01/02 21:57 | upstream | 0bc21e701a6f | d3ccff63 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-badwrites-root | possible deadlock in ext4_readpage_inline | ||
2025/01/02 16:27 | upstream | 56e6a3499e14 | d3ccff63 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | possible deadlock in ext4_readpage_inline | ||
2024/12/26 21:46 | upstream | d6ef8b40d075 | d3ccff63 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | possible deadlock in ext4_readpage_inline | ||
2024/12/21 06:48 | upstream | 499551201b5f | d7f584ee | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | possible deadlock in ext4_readpage_inline |