https://bugzilla.kernel.org/show_bug.cgi?id=203947 --- Comment #14 from Zorro Lang (zlang@xxxxxxxxxx) --- (In reply to Zorro Lang from comment #13) > (In reply to Luis Chamberlain from comment #12) > > (In reply to Zorro Lang from comment #11) > > > (In reply to Zorro Lang from comment #10) > > > > (In reply to Darrick J. Wong from comment #9) > > > > > Zorro, > > > > > > > > > > If you get a chance, can you try this debugging patch, please? > > > > > > > > Sure, I'll give it a try. With this bug together ... they both > triggered > > by > > > > g/475. You really write a nice case :) > > > > > > > > Both these two bugs are too hard to reproduce, so I only can try my > best > > to > > > > test it, but I can't 100% verify they're fixed even if all test pass, > > I'll > > > > try to approach 99% :-P > > > > > > > > BTW, if this's a separate bug, I'd like to report a new bug to track > it, > > to > > > > avoid confusion. > > > > > > > > Thanks, > > > > Zorro > > > > > > Updata: By merging the patches in comment 2 and comment 9, I can't > > reproduce > > > this bug and https://bugzilla.kernel.org/show_bug.cgi?id=204031, after > > > running generic/475 on six different machines 3 days. > > > > Can you try with just the patch in comment 2? Also it doesn't seem clear to > > me yet if this is a regression or not. Did this used to work? If not sure > > can you try with v4.19 and see if the issue also appears there? > > I didn't try to make sure if it's a regression or not. Due to > 1. This bug is very hard to be reproduced. > 2. The reproducer(generic/475) might easily to trigger some other issues on > old kernel. > > Any way, I'll give it a try on v4.19, but I can't promise that I can find > out if it's a regression:) v4.19 reproduced two different panic [1] and [2], but none of them same as above issues: [1] [ 591.414884] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 591.422117] general protection fault: 0000 [#1] SMP KASAN PTI [ 591.427869] CPU: 19 PID: 17963 Comm: xfsaild/dm-0 Tainted: G B W 4.19.0 #1 [ 591.435865] Hardware name: Dell Inc. PowerEdge R740/00WGD1, BIOS 1.3.7 02/08/2018 [ 591.443394] RIP: 0010:xfs_buf_free+0x20f/0x5b0 [xfs] [ 591.448364] Code: 80 02 00 00 0f 86 60 01 00 00 41 80 7d 00 00 0f 85 ff 02 00 00 48 8b 8b 40 02 00 00 44 89 fa 48 8d 14 d1 48 89 d1 48 c1 e9 03 <42> 80 3c 21 00 0f 85 c8 02 00 00 48 8b 3a 31 f6 41 83 c7 01 e8 d8 [ 591.467108] RSP: 0018:ffff880101e3fab0 EFLAGS: 00010246 [ 591.472334] RAX: 0000000000000000 RBX: ffff880001980680 RCX: 0000000000000000 [ 591.479466] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8800019808c0 [ 591.486602] RBP: ffffed0000330120 R08: ffffed0005a681a1 R09: ffffed0005a681a0 [ 591.493730] R10: ffffed0005a681a0 R11: ffff88002d340d03 R12: dffffc0000000000 [ 591.500862] R13: ffffed0000330118 R14: ffff880001980900 R15: 0000000000000000 [ 591.507997] FS: 0000000000000000(0000) GS:ffff880119e00000(0000) knlGS:0000000000000000 [ 591.516081] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 591.521827] CR2: 00007f39c4ebd228 CR3: 0000000013216002 CR4: 00000000007606e0 [ 591.528961] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 591.536094] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 591.543225] PKRU: 55555554 [ 591.545936] Call Trace: [ 591.548438] xfs_buf_rele+0x2f8/0xc80 [xfs] [ 591.552672] ? xfs_buf_hold+0x280/0x280 [xfs] [ 591.557072] ? xfs_buf_unlock+0x1ea/0x2d0 [xfs] [ 591.561647] ? __xfs_buf_submit+0x687/0x730 [xfs] [ 591.566395] ? xfs_buf_ioend+0x446/0x6f0 [xfs] [ 591.570886] __xfs_buf_submit+0x687/0x730 [xfs] [ 591.575460] ? xfs_buf_delwri_submit_buffers+0x36b/0xaa0 [xfs] [ 591.581328] xfs_buf_delwri_submit_buffers+0x36b/0xaa0 [xfs] [ 591.587036] ? xfsaild+0x94a/0x25a0 [xfs] [ 591.591088] ? xfs_bwrite+0x150/0x150 [xfs] [ 591.595319] ? xfs_iunlock+0x310/0x480 [xfs] [ 591.599637] ? xfsaild+0x940/0x25a0 [xfs] [ 591.603697] xfsaild+0x94a/0x25a0 [xfs] [ 591.607542] ? finish_task_switch+0xfc/0x6c0 [ 591.611860] ? xfs_trans_ail_cursor_first+0x180/0x180 [xfs] [ 591.617439] ? lock_downgrade+0x5e0/0x5e0 [ 591.621450] ? __kthread_parkme+0x59/0x180 [ 591.625553] ? __kthread_parkme+0xb6/0x180 [ 591.629699] ? xfs_trans_ail_cursor_first+0x180/0x180 [xfs] [ 591.635273] kthread+0x31a/0x3e0 [ 591.638505] ? kthread_create_worker_on_cpu+0xc0/0xc0 [ 591.643558] ret_from_fork+0x3a/0x50 [ 591.647140] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support dcdbas intel_rapl skx_edac nfit x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel intel_cstate intel_uncore intel_rapl_perf dax_pmem device_dax nd_pmem pcspkr sg i2c_i801 ipmi_ssif mei_me lpc_ich mei ipmi_si ipmi_devintf ipmi_msghandler acpi_power_meter sunrpc ext4 mbcache vfat jbd2 fat xfs libcrc32c sr_mod cdrom sd_mod crc32c_intel mgag200 i2c_algo_bit drm_kms_helper mlx5_core syscopyarea sysfillrect sysimgblt fb_sys_fops ttm ahci ixgbe libahci mdio i40e drm megaraid_sas libata dca tg3 mlxfw [ 591.702756] ---[ end trace e658cafc4d56a43f ]--- [2] [ 852.300021] kasan: CONFIG_KASAN_INLINE enabled [ 852.304474] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 852.311699] general protection fault: 0000 [#1] SMP KASAN PTI [ 852.317444] CPU: 3 PID: 18390 Comm: fsstress Tainted: G W 4.19.0 #1 [ 852.325010] Hardware name: Supermicro SYS-1018R-WR/X10SRW-F, BIOS 2.0 12/17/2015 [ 852.332464] RIP: 0010:xfs_trans_brelse+0xe7/0x560 [xfs] [ 852.337690] Code: 83 7e 03 00 00 89 ed 48 0f a3 2d 74 d0 44 f2 0f 82 bc 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 38 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e f2 03 00 00 81 7b 38 3c 12 00 [ 852.356434] RSP: 0018:ffff8800402b78d8 EFLAGS: 00010202 [ 852.361660] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 852.368786] RDX: 0000000000000007 RSI: 000000000000000a RDI: 0000000000000038 [ 852.375910] RBP: 0000000000000003 R08: ffffed002307d0e1 R09: ffffed002307d0e0 [ 852.383042] R10: ffffed002307d0e0 R11: ffff8801183e8707 R12: ffff880015e74ac0 [ 852.390165] R13: 0000000000000007 R14: ffff880015e74cf8 R15: ffff8800073e3a00 [ 852.397292] FS: 00007fe0d67d7b80(0000) GS:ffff880118200000(0000) knlGS:0000000000000000 [ 852.405376] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 852.411115] CR2: 0000000000dfd000 CR3: 0000000009860002 CR4: 00000000003606e0 [ 852.418238] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 852.425363] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 852.432495] Call Trace: [ 852.434996] xfs_attr_set+0x81c/0xa90 [xfs] [ 852.439214] ? xfs_attr_get+0x530/0x530 [xfs] [ 852.443576] ? avc_has_perm+0xa5/0x4b0 [ 852.447330] ? mark_held_locks+0x140/0x140 [ 852.451427] ? avc_has_perm+0x283/0x4b0 [ 852.455267] ? avc_has_perm_noaudit+0x480/0x480 [ 852.459800] ? lock_downgrade+0x5e0/0x5e0 [ 852.463816] ? creds_are_invalid+0x43/0xd0 [ 852.467974] xfs_xattr_set+0x75/0xe0 [xfs] [ 852.472074] __vfs_setxattr+0xd0/0x130 [ 852.475824] ? xattr_resolve_name+0x4e0/0x4e0 [ 852.480186] __vfs_setxattr_noperm+0xe7/0x390 [ 852.484543] vfs_setxattr+0xa3/0xd0 [ 852.488035] setxattr+0x182/0x240 [ 852.491355] ? vfs_setxattr+0xd0/0xd0 [ 852.495022] ? filename_lookup.part.31+0x1f1/0x360 [ 852.499815] ? mark_held_locks+0x140/0x140 [ 852.503916] ? filename_parentat.part.30+0x3e0/0x3e0 [ 852.508882] ? lock_acquire+0x14f/0x3b0 [ 852.512718] ? mnt_want_write+0x3c/0xa0 [ 852.516560] ? rcu_sync_lockdep_assert+0xf/0x110 [ 852.521178] ? __sb_start_write+0x1b2/0x260 [ 852.525366] path_setxattr+0x11b/0x130 [ 852.529118] ? setxattr+0x240/0x240 [ 852.532610] ? __audit_syscall_exit+0x76b/0xa90 [ 852.537143] __x64_sys_setxattr+0xc0/0x160 [ 852.541244] do_syscall_64+0xa5/0x4a0 [ 852.544908] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 852.549959] RIP: 0033:0x7fe0d5ccd38e [ 852.553530] Code: 48 8b 0d fd 2a 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 bc 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d ca 2a 2c 00 f7 d8 64 89 01 48 [ 852.572277] RSP: 002b:00007ffd90fb1ce8 EFLAGS: 00000206 ORIG_RAX: 00000000000000bc [ 852.579843] RAX: ffffffffffffffda RBX: 0000000000000050 RCX: 00007fe0d5ccd38e [ 852.586968] RDX: 0000000000d3da40 RSI: 00007ffd90fb1d10 RDI: 0000000000d2d3e0 [ 852.594100] RBP: 0000000000000001 R08: 0000000000000002 R09: 00007ffd90fb1a57 [ 852.601224] R10: 0000000000000050 R11: 0000000000000206 R12: 0000000000000002 [ 852.608348] R13: 00000000000001ab R14: 0000000000d3da40 R15: 0000000000000050 [ 852.615477] Modules linked in: sunrpc ext4 mbcache jbd2 iTCO_wdt iTCO_vendor_support intel_rapl sb_edac x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel intel_cstate intel_uncore intel_rapl_perf pcspkr dax_pmem nd_pmem device_dax i2c_i801 lpc_ich ioatdma joydev mei_me sg mei wmi ipmi_ssif ipmi_si ipmi_devintf ipmi_msghandler acpi_power_meter xfs libcrc32c dm_service_time sd_mod ast drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm crc32c_intel ahci libahci igb mpt3sas libata raid_class dca scsi_transport_sas i2c_algo_bit dm_multipath dm_mirror dm_region_hash dm_log dm_mod [ 852.672554] ---[ end trace 10bad956ab83813f ]--- -- You are receiving this mail because: You are watching the assignee of the bug.
