ci starts bisection 2023-10-15 15:03:33.166553706 +0000 UTC m=+213539.662655998
bisecting fixing commit since 7d2f353b2682dcfe5f9bc71e5b61d5b61770d98e
building syzkaller on 03d9c195daed8fca30b642783f35657aa7e32209
ensuring issue is reproducible on original commit 7d2f353b2682dcfe5f9bc71e5b61d5b61770d98e

testing commit 7d2f353b2682dcfe5f9bc71e5b61d5b61770d98e gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 4f1e4f5c2a95eca858f6dcca3e2ba3474b4566c8ef32074ef9d6efed654d129d
all runs: crashed: WARNING in blk_rq_map_user_iov
representative crash: WARNING in blk_rq_map_user_iov, types: [WARNING]
check whether we can drop unnecessary instrumentation
disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed
testing commit 7d2f353b2682dcfe5f9bc71e5b61d5b61770d98e gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 41c693430c3a40f98ba391648eec3bf577346e5c9c28380a9ac94b68bb05257c
all runs: crashed: WARNING in blk_rq_map_user_iov
representative crash: WARNING in blk_rq_map_user_iov, types: [WARNING]
the bug reproduces without the instrumentation
disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed
kconfig minimization: base=3877 full=7643 leaves diff=1995
split chunks (needed=false): <1995>
split chunk #0 of len 1995 into 5 parts
testing without sub-chunk 1/5
disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed
testing commit 7d2f353b2682dcfe5f9bc71e5b61d5b61770d98e gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 8cc6ff03581020092562a211669773aaaf5013530c9f5caa67f3381f349f1d7f
all runs: crashed: WARNING in blk_rq_map_user_iov
representative crash: WARNING in blk_rq_map_user_iov, types: [WARNING]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN KASAN], they are not needed
testing commit 7d2f353b2682dcfe5f9bc71e5b61d5b61770d98e gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 15c8af42912c438c81274ad3a737e2431b997757ff8dd434b6567def0147810f
all runs: crashed: WARNING in blk_rq_map_user_iov
representative crash: WARNING in blk_rq_map_user_iov, types: [WARNING]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed
testing commit 7d2f353b2682dcfe5f9bc71e5b61d5b61770d98e gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 50ba6ff839340a10c844473a7f2a894e54ce40429e7da6eefe1503e743b4d262
all runs: crashed: WARNING in blk_rq_map_user_iov
representative crash: WARNING in blk_rq_map_user_iov, types: [WARNING]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed
testing commit 7d2f353b2682dcfe5f9bc71e5b61d5b61770d98e gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 460a9ae75950468efcac8ecf1921d87ab7f95ea7873ab492f2e17f9a1c582648
all runs: crashed: WARNING in blk_rq_map_user_iov
representative crash: WARNING in blk_rq_map_user_iov, types: [WARNING]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 7d2f353b2682dcfe5f9bc71e5b61d5b61770d98e gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: a9e8482c1ccaffb6a7f7e80ceeabfb77f241da9fd42ceec68f8774955d1c03cb
all runs: crashed: WARNING in blk_rq_map_user_iov
representative crash: WARNING in blk_rq_map_user_iov, types: [WARNING]
the chunk can be dropped
disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed
testing current HEAD 9a3dad63edbe9a2ab2be1e7361a2133f519f855b
testing commit 9a3dad63edbe9a2ab2be1e7361a2133f519f855b gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: aa4daf433c8fd7940dab524e34c100dc3b853df8448843704a30519edcf230b9
all runs: crashed: WARNING in blk_rq_map_user_iov
representative crash: WARNING in blk_rq_map_user_iov, types: [WARNING]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 1h9m9.267770626s (build: 40m26.943102581s, test: 24m5.485294863s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag '6.6-rc5-ksmbd-server-fixes' of git://git.samba.org/ksmbd
crash: WARNING in blk_rq_map_user_iov
------------[ cut here ]------------
WARNING: CPU: 1 PID: 1844 at lib/iov_iter.c:385 _copy_from_iter+0x90/0x480 lib/iov_iter.c:396
Modules linked in:
CPU: 1 PID: 1844 Comm: syz-executor.0 Not tainted 6.6.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:_copy_from_iter+0x90/0x480 lib/iov_iter.c:385
Code: 49 89 47 18 48 8b 44 24 50 65 48 2b 04 25 28 00 00 00 0f 85 c1 03 00 00 48 83 c4 58 4c 89 f0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 <0f> 0b 45 31 f6 eb d3 84 d2 0f 85 a9 00 00 00 49 8b 6f 08 4c 89 3c
RSP: 0018:ffffc90000f477d8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffea00042bb800 RCX: ffffc90000f478d8
RDX: ffffc90000f478d8 RSI: 0000000000001000 RDI: ffff88810aee0000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000200
R10: 0000000000000000 R11: ffff8881052f6800 R12: 0000000000000000
R13: ffff888000000000 R14: 0000160000000000 R15: 0000000000001000
FS:  00007f6af653a6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020670000 CR3: 0000000108aa8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 copy_page_from_iter lib/iov_iter.c:542 [inline]
 copy_page_from_iter+0x8d/0x140 lib/iov_iter.c:531
 bio_copy_from_iter block/blk-map.c:56 [inline]
 bio_copy_user_iov block/blk-map.c:211 [inline]
 blk_rq_map_user_iov+0x4bf/0x7b0 block/blk-map.c:661
 blk_rq_map_user_io.part.0+0x129/0x160 block/blk-map.c:719
 sg_start_req drivers/scsi/sg.c:1818 [inline]
 sg_common_write.constprop.0+0x40d/0x580 drivers/scsi/sg.c:803
 sg_new_write.isra.0+0x163/0x270 drivers/scsi/sg.c:770
 sg_write+0x368/0x3c0 drivers/scsi/sg.c:632
 do_loop_readv_writev fs/read_write.c:758 [inline]
 do_loop_readv_writev fs/read_write.c:743 [inline]
 do_iter_write+0x176/0x1f0 fs/read_write.c:862
 vfs_writev+0x10b/0x240 fs/read_write.c:933
 do_writev+0x7f/0x160 fs/read_write.c:976
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6af69b7ae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6af653a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f6af6ad6f80 RCX: 00007f6af69b7ae9
RDX: 0000000000000002 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007f6af6a0347a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000006 R14: 00007f6af6ad6f80 R15: 00007fff78b06438
 </TASK>