diff options
Diffstat (limited to 'pkg/report/testdata/linux/guilty')
| -rw-r--r-- | pkg/report/testdata/linux/guilty/61 | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/pkg/report/testdata/linux/guilty/61 b/pkg/report/testdata/linux/guilty/61 new file mode 100644 index 000000000..c83c9c727 --- /dev/null +++ b/pkg/report/testdata/linux/guilty/61 @@ -0,0 +1,116 @@ +FILE: + +====================================================== +WARNING: possible circular locking dependency detected +6.2.0-rc6-syzkaller-00163-g66a87fff1a87 #0 Not tainted +------------------------------------------------------ +syz-executor.3/1006 is trying to acquire lock: +ffff88814b6c4650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x53d/0x1230 + +but task is already holding lock: +ffff88814b6c6b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_ext_migrate+0x2e2/0x1310 + +which lock already depends on the new lock. + + +the existing dependency chain (in reverse order) is: + +-> #3 (&sbi->s_writepages_rwsem){++++}-{0:0}: + lock_acquire+0x20b/0x600 + percpu_down_write+0x54/0x2f0 + ext4_ind_migrate+0x258/0x760 + ext4_fileattr_set+0xe94/0x1770 + vfs_fileattr_set+0x8f2/0xd30 + do_vfs_ioctl+0x1dbe/0x2a40 + __se_sys_ioctl+0x81/0x160 + do_syscall_64+0x41/0xc0 + entry_SYSCALL_64_after_hwframe+0x63/0xcd + +-> #2 (&sb->s_type->i_mutex_key#8){++++}-{3:3}: + lock_acquire+0x20b/0x600 + down_read+0x3d/0x50 + ext4_bmap+0x4f/0x410 + bmap+0xa5/0xe0 + jbd2_journal_flush+0x5b6/0xc40 + ext4_ioctl+0x39b9/0x6130 + __se_sys_ioctl+0xf1/0x160 + do_syscall_64+0x41/0xc0 + entry_SYSCALL_64_after_hwframe+0x63/0xcd + +-> #1 (&journal->j_checkpoint_mutex){+.+.}-{3:3}: + lock_acquire+0x20b/0x600 + __mutex_lock_common+0x1c2/0x2630 + mutex_lock_io_nested+0x47/0x60 + __jbd2_log_wait_for_space+0x209/0x6c0 + add_transaction_credits+0x94a/0xc00 + start_this_handle+0x739/0x1660 + jbd2__journal_start+0x2d5/0x5d0 + __ext4_journal_start_sb+0x363/0x880 + ext4_evict_inode+0x9b0/0x1230 + evict+0x2a4/0x620 + do_unlinkat+0x4ad/0x8c0 + __x64_sys_unlink+0x49/0x50 + do_syscall_64+0x41/0xc0 + entry_SYSCALL_64_after_hwframe+0x63/0xcd + +-> #0 (sb_internal){.+.+}-{0:0}: + validate_chain+0x166b/0x5860 + __lock_acquire+0x125b/0x1f80 + lock_acquire+0x20b/0x600 + percpu_down_read+0x44/0x190 + ext4_evict_inode+0x53d/0x1230 + evict+0x2a4/0x620 + ext4_ext_migrate+0x102a/0x1310 + ext4_ioctl+0x1caf/0x6130 + __se_sys_ioctl+0xf1/0x160 + do_syscall_64+0x41/0xc0 + entry_SYSCALL_64_after_hwframe+0x63/0xcd + +other info that might help us debug this: + +Chain exists of: + sb_internal --> &sb->s_type->i_mutex_key#8 --> &sbi->s_writepages_rwsem + + Possible unsafe locking scenario: + + CPU0 CPU1 + ---- ---- + lock(&sbi->s_writepages_rwsem); + lock(&sb->s_type->i_mutex_key#8); + lock(&sbi->s_writepages_rwsem); + lock(sb_internal); + + *** DEADLOCK *** + +3 locks held by syz-executor.3/1006: + #0: ffff88814b6c4460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write_file+0x5e/0x1f0 + #1: ffff888051572218 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_ioctl+0x1ca7/0x6130 + #2: ffff88814b6c6b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_ext_migrate+0x2e2/0x1310 + +stack backtrace: +CPU: 0 PID: 1006 Comm: syz-executor.3 Not tainted 6.2.0-rc6-syzkaller-00163-g66a87fff1a87 #0 +Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 +Call Trace: + <TASK> + dump_stack_lvl+0x1b5/0x2a0 + check_noncircular+0x2d1/0x390 + validate_chain+0x166b/0x5860 + __lock_acquire+0x125b/0x1f80 + lock_acquire+0x20b/0x600 + percpu_down_read+0x44/0x190 + ext4_evict_inode+0x53d/0x1230 + evict+0x2a4/0x620 + ext4_ext_migrate+0x102a/0x1310 + ext4_ioctl+0x1caf/0x6130 + __se_sys_ioctl+0xf1/0x160 + do_syscall_64+0x41/0xc0 + entry_SYSCALL_64_after_hwframe+0x63/0xcd +RIP: 0033:0x7f275948c0c9 +Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 +RSP: 002b:00007f275a288168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 +RAX: ffffffffffffffda RBX: 00007f27595abf80 RCX: 00007f275948c0c9 +RDX: 0000000000000000 RSI: 0000000000006609 RDI: 0000000000000003 +RBP: 00007f27594e7ae9 R08: 0000000000000000 R09: 0000000000000000 +R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 +R13: 00007ffe180057ef R14: 00007f275a288300 R15: 0000000000022000 + </TASK> |