Bug 204043
| Summary: | F2fs kernel BUG at fs/f2fs/data.c:317! | ||
|---|---|---|---|
| Product: | File System | Reporter: | midwinter1993 |
| Component: | f2fs | Assignee: | Default virtual assignee for f2fs (filesystem_f2fs) |
| Status: | RESOLVED CODE_FIX | ||
| Severity: | normal | CC: | chao |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 5.1.3 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: | syscall in C code | ||
Could you help to add below diff to check debug info?
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index bc5cea27b512..333285cb14c5 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -241,7 +241,7 @@ static inline void __submit_bio(struct f2fs_sb_info *sbi,
struct bio *bio, enum page_type type)
{
if (!is_read_io(bio_op(bio))) {
- unsigned int start;
+ unsigned int start, ofs;
if (type != DATA && type != NODE)
goto submit_io;
@@ -256,7 +256,7 @@ static inline void __submit_bio(struct f2fs_sb_info *sbi,
goto submit_io;
/* fill dummy pages */
- for (; start < F2FS_IO_SIZE(sbi); start++) {
+ for (ofs = start; ofs < F2FS_IO_SIZE(sbi); ofs++) {
struct page *page =
mempool_alloc(sbi->write_io_dummy,
GFP_NOIO | __GFP_NOFAIL);
@@ -266,8 +266,16 @@ static inline void __submit_bio(struct f2fs_sb_info *sbi,
SetPagePrivate(page);
set_page_private(page, (unsigned long)DUMMY_WRITTEN_PAGE);
lock_page(page);
- if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE)
- f2fs_bug_on(sbi, 1);
+ if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
+ printk("ofs:%u, start:%u, io_size:%u, "
+ "size:%u, vcnt:%u, max_vecs:%u",
+ ofs, start, F2FS_IO_SIZE(sbi),
+ bio->bi_iter.bi_size,
+ bio->bi_vcnt,
+ bio->bi_max_vecs);
+ WARN_ON(1);
+ break;
+ }
}
/*
* In the NODE case, we lose next block address chain. So, we
(In reply to Chao Yu from comment #1) > Could you help to add below diff to check debug info? > > diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c > index bc5cea27b512..333285cb14c5 100644 > --- a/fs/f2fs/data.c > +++ b/fs/f2fs/data.c > @@ -241,7 +241,7 @@ static inline void __submit_bio(struct f2fs_sb_info *sbi, > struct bio *bio, enum page_type type) > { > if (!is_read_io(bio_op(bio))) { > - unsigned int start; > + unsigned int start, ofs; > > if (type != DATA && type != NODE) > goto submit_io; > @@ -256,7 +256,7 @@ static inline void __submit_bio(struct f2fs_sb_info *sbi, > goto submit_io; > > /* fill dummy pages */ > - for (; start < F2FS_IO_SIZE(sbi); start++) { > + for (ofs = start; ofs < F2FS_IO_SIZE(sbi); ofs++) { > struct page *page = > mempool_alloc(sbi->write_io_dummy, > GFP_NOIO | __GFP_NOFAIL); > @@ -266,8 +266,16 @@ static inline void __submit_bio(struct f2fs_sb_info > *sbi, > SetPagePrivate(page); > set_page_private(page, (unsigned long)DUMMY_WRITTEN_PAGE); > lock_page(page); > - if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) > - f2fs_bug_on(sbi, 1); > + if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { > + printk("ofs:%u, start:%u, io_size:%u, " > + "size:%u, vcnt:%u, max_vecs:%u", > + ofs, start, F2FS_IO_SIZE(sbi), > + bio->bi_iter.bi_size, > + bio->bi_vcnt, > + bio->bi_max_vecs); > + WARN_ON(1); > + break; > + } > } > /* > * In the NODE case, we lose next block address chain. So, we Hi! I patched the kernel, and after I run the test case about 7 times, a warning occurred: [ 78.460040] F2FS-fs (loop0): Test dummy encryption mount option ignored [ 78.464621] F2FS-fs (loop0): Found nat_bits in checkpoint [ 78.479864] F2FS-fs (loop0): Mounted with checkpoint version = aaca8fb [ 78.482474] F2FS-fs (loop0): Test dummy encryption mount option ignored [ 78.483451] F2FS-fs (loop0): switch extent_cache option is not allowed [ 78.691092] ofs:1, start:1, io_size:8, size:1085440, vcnt:256, max_vecs:256 [ 78.691161] WARNING: CPU: 1 PID: 1072 at fs/f2fs/data.c:323 __submit_merged_bio.cold+0x74/0x7c [ 78.693234] Modules linked in: [ 78.693579] CPU: 1 PID: 1072 Comm: kworker/u4:3 Not tainted 5.1.3 #8 [ 78.694330] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014 [ 78.695523] Workqueue: writeback wb_workfn (flush-7:0) [ 78.696109] RIP: 0010:__submit_merged_bio.cold+0x74/0x7c [ 78.696762] Code: 00 00 00 45 89 e1 41 89 e8 41 8b 8d bc 04 00 00 41 57 48 c7 c7 80 6f dd 8c 8b 54 24 3c 8b 74 24 10 d3 e0 89 c1 e8 50 01 68 ff <0f> 0b 58 e9 15 c3 fe ff e8 9a 4f 73 ff 49 8d 7c 24 5a e8 60 89 89 [ 78.699018] RSP: 0018:ffff888117fa7140 EFLAGS: 00010282 [ 78.699620] RAX: 000000000000003f RBX: ffff88810828bb40 RCX: 0000000000000000 [ 78.700530] RDX: 0000000000000000 RSI: 0000000000000278 RDI: ffffed1022ff4e1a [ 78.701337] RBP: 0000000000109000 R08: 000000000000003f R09: fffffbfff1c7766c [ 78.702027] R10: fffffbfff1c7766b R11: ffffffff8e3bb35e R12: 0000000000000100 [ 78.702874] R13: ffff888107a1a200 R14: ffff888108101500 R15: 0000000000000100 [ 78.703735] FS: 0000000000000000(0000) GS:ffff88811b500000(0000) knlGS:0000000000000000 [ 78.704722] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.705383] CR2: 00005615108e12d8 CR3: 0000000107c58000 CR4: 00000000000006e0 [ 78.706229] Call Trace: [ 78.706498] f2fs_submit_page_write+0x3cd/0xdd0 [ 78.707014] do_write_page+0x15d/0x360 [ 78.707453] f2fs_outplace_write_data+0xd7/0x210 [ 78.707985] ? f2fs_do_write_node_page+0x190/0x190 [ 78.708549] ? __enqueue_entity+0xae/0xe0 [ 78.709047] f2fs_do_write_data_page+0x43b/0xf30 [ 78.709590] ? f2fs_should_update_outplace+0x1c0/0x1c0 [ 78.710177] ? __switch_to_asm+0x34/0x70 [ 78.710602] ? __switch_to_asm+0x40/0x70 [ 78.711067] ? __switch_to_asm+0x34/0x70 [ 78.711534] ? finish_task_switch+0x145/0x370 [ 78.712048] ? __switch_to_asm+0x34/0x70 [ 78.712497] ? __switch_to_asm+0x40/0x70 [ 78.712959] __write_data_page+0xcf6/0x1140 [ 78.713461] ? page_mapped+0xf8/0x1f0 [ 78.713870] ? f2fs_do_write_data_page+0xf30/0xf30 [ 78.714462] ? page_referenced+0x3d0/0x3d0 [ 78.714909] ? _raw_write_unlock_irqrestore+0x20/0x20 [ 78.715533] f2fs_write_cache_pages+0x3ba/0xb40 [ 78.716032] ? __write_data_page+0x1140/0x1140 [ 78.716492] ? f2fs_fsync_node_pages+0xf90/0xf90 [ 78.717021] ? xas_start+0xbf/0x1c0 [ 78.717451] ? __mutex_lock_slowpath+0x10/0x10 [ 78.717995] f2fs_write_data_pages+0x3dd/0x8b0 [ 78.718506] ? f2fs_write_cache_pages+0xb40/0xb40 [ 78.719052] ? f2fs_set_node_page_dirty+0x175/0x3a0 [ 78.719618] ? f2fs_inode_synced+0x1c7/0x200 [ 78.720069] ? memset+0x20/0x40 [ 78.720447] ? f2fs_write_cache_pages+0xb40/0xb40 [ 78.721006] do_writepages+0xbb/0x1e0 [ 78.721444] ? page_writeback_cpu_online+0x10/0x10 [ 78.721964] ? _raw_spin_lock+0x75/0xd0 [ 78.722409] ? _raw_spin_lock_irq+0xd0/0xd0 [ 78.722891] ? __wake_up_bit+0x84/0xe0 [ 78.723331] __writeback_single_inode+0xb6/0x800 [ 78.723861] ? inode_add_lru+0xd9/0x110 [ 78.724273] writeback_sb_inodes+0x441/0x910 [ 78.724756] ? sync_inode_metadata+0x100/0x100 [ 78.725263] ? queue_io+0x16b/0x220 [ 78.725674] wb_writeback+0x261/0x650 [ 78.726129] ? __switch_to_asm+0x34/0x70 [ 78.726641] ? __writeback_inodes_wb+0x170/0x170 [ 78.727361] ? cwt_wakefn+0x60/0x60 [ 78.728104] ? _raw_spin_lock_bh+0x80/0xd0 [ 78.728827] ? _raw_read_unlock_irqrestore+0x20/0x20 [ 78.729542] ? __switch_to_asm+0x34/0x70 [ 78.730121] ? wb_workfn+0xc4/0x7a0 [ 78.730643] wb_workfn+0x1f9/0x7a0 [ 78.731161] ? inode_wait_for_writeback+0x40/0x40 [ 78.731868] ? __schedule+0x481/0xc80 [ 78.732417] ? _raw_spin_lock_irq+0x76/0xd0 [ 78.733046] ? read_word_at_a_time+0xe/0x20 [ 78.733668] ? strscpy+0xb2/0x180 [ 78.734168] process_one_work+0x503/0x970 [ 78.734770] worker_thread+0x7d/0x820 [ 78.735322] kthread+0x1ad/0x210 [ 78.735821] ? process_one_work+0x970/0x970 [ 78.736443] ? kthread_park+0x130/0x130 [ 78.737020] ret_from_fork+0x35/0x40 [ 78.737555] ---[ end trace 5a4cea2bd5b6d207 ]--- Could you help to test below two commits?
f2fs: introduce {page,io}_is_mergeable() for readability
f2fs: fix panic of IO alignment feature
https://lore.kernel.org/linux-f2fs-devel/1562841517-77910-1-git-send-email-yuchao0@huawei.com/T/#t
https://lore.kernel.org/linux-f2fs-devel/1562841517-77910-2-git-send-email-yuchao0@huawei.com/T/#u
Sorry, previous version is broken... I've updated them. https://lore.kernel.org/linux-f2fs-devel/20190712085542.4068-1-yuchao0@huawei.com/T/#u (In reply to Chao Yu from comment #4) > Sorry, previous version is broken... I've updated them. > > https://lore.kernel.org/linux-f2fs-devel/20190712085542.4068-1- > yuchao0@huawei.com/T/#u Sorry! I have not tested these patches yet. :( I have just tried the updated patch but failed. It seems inconsistent with kernel-5.1.3? You mean it failed when you apply those patches to kernel 5.1.3? I made patches based on last dev branch below: https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git/log/?h=dev Could you download last code for test? Last code should has issues you reported. (In reply to Chao Yu from comment #6) > You mean it failed when you apply those patches to kernel 5.1.3? > > I made patches based on last dev branch below: > > https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git/log/?h=dev > > Could you download last code for test? Last code should has issues you > reported. Hi! I cloned the repo and patched the latest dev branch. The aforementioned kernel bug does not manifest again with the provided script. But my original(complex/long) script triggers another bug; I'm not sure whether this bug was introduced by the patch. --- Core dump --- [ 17.678583] ------------[ cut here ]------------ [ 17.679405] kernel BUG at fs/f2fs/segment.c:2391! [ 17.680654] invalid opcode: 0000 [#1] SMP KASAN PTI [ 17.681394] CPU: 0 PID: 461 Comm: runner-1 Not tainted 5.2.0+ #5 [ 17.682279] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014 [ 17.683674] RIP: 0010:new_curseg+0xbb5/0xf10 [ 17.684309] Code: 14 11 84 d2 74 09 80 fa 03 0f 8e 19 03 00 00 44 0f af ad 00 04 00 00 44 39 e8 0f 83 7f f7 ff ff e9 45 fa ff ff e8 8b 61 80 ff <0f> 0b e8 84 61 80 ff 44 89 e8 31 d2 f7 74 24 08 89 c3 e9 5a f6 ff [ 17.687001] RSP: 0018:ffff888110c0f360 EFLAGS: 00010293 [ 17.687772] RAX: ffff88811514b400 RBX: 0000000000000000 RCX: ffffffffb93585b5 [ 17.688792] RDX: 0000000000000000 RSI: 0000000000000048 RDI: ffff88810f9fe900 [ 17.689771] RBP: ffff888112b2aa80 R08: 0000000000000000 R09: ffffed1022181e62 [ 17.690804] R10: ffffed1022181e61 R11: 0000000000000003 R12: ffff888111f4ff30 [ 17.691852] R13: 0000000000000048 R14: ffff88810f9fe900 R15: 0000000000000048 [ 17.692894] FS: 00005555571fe8c0(0000) GS:ffff88811b200000(0000) knlGS:0000000000000000 [ 17.694066] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 17.694926] CR2: 0000555557302000 CR3: 0000000110406000 CR4: 00000000000006f0 [ 17.695981] Call Trace: [ 17.696372] ? f2fs_need_SSR+0x4fe/0x670 [ 17.696973] allocate_segment_by_default+0x222/0x440 [ 17.697717] f2fs_allocate_data_block+0x649/0x2720 [ 17.698409] ? f2fs_submit_page_write+0xc25/0x19c0 [ 17.699035] do_write_page+0x1c1/0x590 [ 17.699628] f2fs_outplace_write_data+0x157/0x3d0 [ 17.700439] ? f2fs_do_write_node_page+0x280/0x280 [ 17.701188] ? f2fs_is_valid_blkaddr+0x1f8/0xe70 [ 17.701807] f2fs_do_write_data_page+0xa60/0x13f0 [ 17.702353] ? f2fs_should_update_outplace+0x330/0x330 [ 17.703017] ? _raw_spin_lock+0x75/0xd0 [ 17.703556] ? percpu_counter_add_batch+0xc1/0x110 [ 17.704215] ? f2fs_remove_dirty_inode+0x191/0x520 [ 17.704873] move_data_page+0x5bc/0x990 [ 17.705405] ? get_victim_by_default+0x21d0/0x21d0 [ 17.705986] ? down_read_trylock+0x170/0x170 [ 17.706402] ? __radix_tree_lookup+0x1a9/0x220 [ 17.706834] do_garbage_collect+0x14cd/0x4020 [ 17.707339] ? __switch_to_asm+0x40/0x70 [ 17.707797] ? mutex_lock+0x89/0xd0 [ 17.708167] ? mutex_unlock+0x18/0x40 [ 17.708555] ? move_data_block+0x2500/0x2500 [ 17.709004] ? preempt_schedule_common+0x36/0x50 [ 17.709488] ? down_read+0x1f0/0x1f0 [ 17.709869] f2fs_gc+0x69b/0x37e0 [ 17.710224] ? f2fs_start_bidx_of_node+0x40/0x40 [ 17.710709] ? delete_node+0x1ef/0x820 [ 17.711114] ? node_tag_clear+0x8a/0x1b0 [ 17.711530] ? mutex_lock+0x89/0xd0 [ 17.711901] ? __mutex_lock_slowpath+0x10/0x10 [ 17.712368] ? f2fs_balance_fs+0x5ae/0x19c0 [ 17.712809] f2fs_balance_fs+0x5ae/0x19c0 [ 17.713232] ? __d_instantiate+0x320/0x430 [ 17.713664] f2fs_mkdir+0x40a/0x5e0 [ 17.714034] ? security_inode_mkdir+0xca/0x100 [ 17.714501] vfs_mkdir+0x351/0x560 [ 17.714864] do_mkdirat+0x11b/0x210 [ 17.715242] ? __ia32_sys_mknod+0xb0/0xb0 [ 17.715687] ? schedule+0x9c/0x230 [ 17.716051] do_syscall_64+0x9a/0x330 [ 17.716440] ? prepare_exit_to_usermode+0x142/0x1d0 [ 17.716953] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 17.717485] RIP: 0033:0x50eaf7 [ 17.717813] Code: 1f 40 00 b8 89 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 2d f5 f8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 0d f5 f8 ff c3 66 2e 0f 1f 84 00 00 00 00 [ 17.719740] RSP: 002b:00007ffff7965da8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 17.720531] RAX: ffffffffffffffda RBX: 0000000000400328 RCX: 000000000050eaf7 [ 17.721273] RDX: 0000555557337f90 RSI: 00000000000001fd RDI: 0000555557337f90 [ 17.722015] RBP: 00007ffff7965de0 R08: 0000000000000000 R09: 000000000000003e [ 17.722963] R10: 0000000000000035 R11: 0000000000000202 R12: 000000000049e490 [ 17.723941] R13: 000000000049e520 R14: 0000000000000000 R15: 0000000000000000 [ 17.724914] Modules linked in: [ 17.725343] Dumping ftrace buffer: [ 17.725816] (ftrace buffer empty) [ 17.726356] ---[ end trace 110112c63ed78316 ]--- This bug was reported by you in another track... So could you confirm the issue in this track again? BTW, to avoid panic in new_curseg(), you'd better to expand image size. (In reply to Chao Yu from comment #8) > This bug was reported by you in another track... > > So could you confirm the issue in this track again? Sorry! I forgot that bug. I have tested the patch with the triggering script several times, and the issue in this track does not happen again (though another bug occurs). Thank you! :-P Thanks for confirming that! Let me close this track. :) |
Created attachment 283507 [details] syscall in C code I mounted an f2fs image and did some operations, then, a bug occurred. This bug does not occur every time, but according to my attempts, it occurs at least 1/5 (hitting once in five runnings). The attached file is the syscall I did in C code. The triggering script follows: (it should be run by root) ``` #!/bin/bash DISK_NAME=xx.img dd if=/dev/zero of=xx.img bs=1M count=196 mkfs.f2fs -a 0 -o 0 -t 0 -z 9 -f -q $DISK_NAME g++ -static 2.c losetup "/dev/loop0" $DISK_NAME mkdir /root/mnt ./a.out umount /root/mnt losetup -D ``` --- Core dump --- [ 54.834378] kernel BUG at fs/f2fs/data.c:317! [ 54.835035] invalid opcode: 0000 [#1] SMP KASAN PTI [ 54.835727] CPU: 1 PID: 1094 Comm: kworker/u4:4 Not tainted 5.1.3 #7 [ 54.836608] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014 [ 54.837998] Workqueue: writeback wb_workfn (flush-7:0) [ 54.838732] RIP: 0010:__submit_merged_bio+0x8b0/0x8c0 [ 54.839453] Code: 8b 54 24 1c 4c 89 f1 4c 89 e6 e8 2b 75 33 01 48 89 ef e8 e3 c4 8a ff 4c 8b 6d 00 4d 85 ed 75 ca e9 cc fd ff ff e8 10 89 74 ff <0f> 0b 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 41 57 41 56 41 55 [ 54.842001] RSP: 0018:ffff888069af7158 EFLAGS: 00010293 [ 54.842732] RAX: ffff888069ad9980 RBX: ffff88806a2624c0 RCX: ffffffffaf2c9ca0 [ 54.843738] RDX: 0000000000000000 RSI: 0000000000000fff RDI: 0000000000000005 [ 54.844718] RBP: 0000000000000000 R08: ffff888069ad9980 R09: ffff8880594a0000 [ 54.845709] R10: ffffed100b2941ff R11: ffff8880594a0fff R12: ffff88805a0b2200 [ 54.846702] R13: 0000000000000001 R14: ffff88805a171600 R15: ffff88806a2624c8 [ 54.847700] FS: 0000000000000000(0000) GS:ffff88806d300000(0000) knlGS:0000000000000000 [ 54.848817] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.849602] CR2: 00007fddbb634d30 CR3: 00000000698d2000 CR4: 00000000000006e0 [ 54.850570] Call Trace: [ 54.850946] f2fs_submit_page_write+0x3cd/0xdd0 [ 54.851577] do_write_page+0x15d/0x360 [ 54.852137] f2fs_outplace_write_data+0xd7/0x210 [ 54.852776] ? f2fs_do_write_node_page+0x190/0x190 [ 54.853449] ? __save_stack_trace+0x7a/0xf0 [ 54.854033] f2fs_do_write_data_page+0x43b/0xf30 [ 54.854672] ? f2fs_should_update_outplace+0x1c0/0x1c0 [ 54.855386] ? kmem_cache_alloc+0xab/0x1b0 [ 54.855956] ? add_free_nid+0x5d/0x390 [ 54.856479] ? f2fs_write_node_pages+0xf5/0x5c0 [ 54.857109] ? do_writepages+0xbb/0x1e0 [ 54.857650] __write_data_page+0xcf6/0x1140 [ 54.858234] ? page_mapped+0xf8/0x1f0 [ 54.858748] ? f2fs_do_write_data_page+0xf30/0xf30 [ 54.859419] ? page_referenced+0x3d0/0x3d0 [ 54.859985] f2fs_write_cache_pages+0x3ba/0xb40 [ 54.860617] ? __write_data_page+0x1140/0x1140 [ 54.861238] ? xas_start+0xbf/0x1c0 [ 54.861728] ? __mutex_lock_slowpath+0x10/0x10 [ 54.862349] f2fs_write_data_pages+0x3dd/0x8b0 [ 54.862975] ? f2fs_write_cache_pages+0xb40/0xb40 [ 54.863627] ? f2fs_set_node_page_dirty+0x175/0x3a0 [ 54.864299] ? f2fs_inode_synced+0x1c7/0x200 [ 54.864891] ? memset+0x20/0x40 [ 54.865336] ? f2fs_write_cache_pages+0xb40/0xb40 [ 54.865987] do_writepages+0xbb/0x1e0 [ 54.866504] ? page_writeback_cpu_online+0x10/0x10 [ 54.867175] ? _raw_spin_lock+0x75/0xd0 [ 54.867712] ? _raw_spin_lock_irq+0xd0/0xd0 [ 54.868311] ? __wake_up_bit+0x84/0xe0 [ 54.868867] __writeback_single_inode+0xb6/0x800 [ 54.869511] ? inode_add_lru+0xd9/0x110 [ 54.870046] writeback_sb_inodes+0x441/0x910 [ 54.870640] ? sync_inode_metadata+0x100/0x100 [ 54.871251] ? queue_io+0x16b/0x220 [ 54.871737] wb_writeback+0x261/0x650 [ 54.872237] ? __writeback_inodes_wb+0x170/0x170 [ 54.872874] ? cwt_wakefn+0x60/0x60 [ 54.873360] ? _raw_spin_lock_bh+0x80/0xd0 [ 54.873924] ? _raw_read_unlock_irqrestore+0x20/0x20 [ 54.874604] ? __switch_to_asm+0x34/0x70 [ 54.875151] ? wb_workfn+0xc4/0x7a0 [ 54.875644] wb_workfn+0x1f9/0x7a0 [ 54.876118] ? inode_wait_for_writeback+0x40/0x40 [ 54.876765] ? __schedule+0x481/0xc80 [ 54.877271] ? _raw_spin_lock_irq+0x76/0xd0 [ 54.877847] ? read_word_at_a_time+0xe/0x20 [ 54.878427] ? strscpy+0xb2/0x180 [ 54.878896] process_one_work+0x503/0x970 [ 54.879449] worker_thread+0x7d/0x820 [ 54.879952] kthread+0x1ad/0x210 [ 54.880400] ? process_one_work+0x970/0x970 [ 54.880960] ? kthread_park+0x130/0x130 [ 54.881395] ret_from_fork+0x35/0x40 [ 54.881741] Modules linked in: [ 54.882041] Dumping ftrace buffer: [ 54.882380] (ftrace buffer empty) [ 54.882768] ---[ end trace 06d1c400edad9651 ]--- [ 54.883254] RIP: 0010:__submit_merged_bio+0x8b0/0x8c0 [ 54.883749] Code: 8b 54 24 1c 4c 89 f1 4c 89 e6 e8 2b 75 33 01 48 89 ef e8 e3 c4 8a ff 4c 8b 6d 00 4d 85 ed 75 ca e9 cc fd ff ff e8 10 89 74 ff <0f> 0b 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 41 57 41 56 41 55 [ 54.885518] RSP: 0018:ffff888069af7158 EFLAGS: 00010293 [ 54.886037] RAX: ffff888069ad9980 RBX: ffff88806a2624c0 RCX: ffffffffaf2c9ca0 [ 54.886717] RDX: 0000000000000000 RSI: 0000000000000fff RDI: 0000000000000005 [ 54.887470] RBP: 0000000000000000 R08: ffff888069ad9980 R09: ffff8880594a0000 [ 54.888228] R10: ffffed100b2941ff R11: ffff8880594a0fff R12: ffff88805a0b2200 [ 54.888983] R13: 0000000000000001 R14: ffff88805a171600 R15: ffff88806a2624c8 [ 54.889723] FS: 0000000000000000(0000) GS:ffff88806d300000(0000) knlGS:0000000000000000 [ 54.890572] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.891199] CR2: 00007fddbb634d30 CR3: 00000000698d2000 CR4: 00000000000006e0 [ 54.891972] Kernel panic - not syncing: Fatal exception [ 54.892717] Dumping ftrace buffer: [ 54.893200] (ftrace buffer empty) [ 54.893646] Kernel Offset: 0x2d800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)