bisecting fixing commit since 6b7b0056defc6eb5c87bbe4690ccda547b2891aa
building syzkaller on 858ea628800647d5e5b68b11441e42b8ef5652c1
testing commit 6b7b0056defc6eb5c87bbe4690ccda547b2891aa with gcc (GCC) 8.4.1 20210217
kernel signature: 66a7e10b883ecf99ebd97205a7145d70d57afed8bc011ce73bcf00c508f810f6
all runs: crashed: kernel BUG in inline_xattr_iter_begin
testing current HEAD eb575cd5d7f60241d016fdd13a9e86d962093c9b
testing commit eb575cd5d7f60241d016fdd13a9e86d962093c9b with gcc (GCC) 8.4.1 20210217
kernel signature: 72a2e1fe43f6d6e8867dbc28b55f9ae4cc8b9048f10db1d0654d284d2ad62a1a
all runs: crashed: kernel BUG in inline_xattr_iter_begin
revisions tested: 2, total time: 23m35.931576524s (build: 16m40.955701985s, test: 6m32.585654527s)
the crash still happens on HEAD
commit msg: Linux 4.19.195
crash: kernel BUG in inline_xattr_iter_begin
erofs: root inode @ nid 36
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
erofs: mounted on /dev/loop2 with opts: .
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
------------[ cut here ]------------
kernel BUG at drivers/staging/erofs/xattr.c:186!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 9878 Comm: syz-executor.2 Not tainted 4.19.195-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:inline_xattr_iter_begin+0x37a/0x4a0 drivers/staging/erofs/xattr.c:186
Code: 08 84 d2 0f 85 30 01 00 00 0f b7 43 ea 48 83 c4 18 5b 41 5c 44 29 e8 41 5d 41 5e 41 5f 5d c3 b8 c3 ff ff ff 0f 83 1e ff ff ff <0f> 0b 48 89 45 d0 e8 2b 77 aa fb 48 8b 45 d0 e9 0a fd ff ff 4c 89
RSP: 0018:ffff88808dae7c40 EFLAGS: 00010283
RAX: 00000000ffffffc3 RBX: ffff888080e5a4c0 RCX: 0000000000000000
RDX: 0000000000000048 RSI: ffff888080e5a4c0 RDI: ffff888080e5a4ac
RBP: ffff88808dae7c80 R08: fffff940004c4677 R09: fffff940004c4676
R10: fffff940004c4676 R11: ffffea00026233b7 R12: ffff888080e5a498
R13: 0000000000000280 R14: ffff88808dae7d40 R15: ffff888080e5a4aa
FS:  00007faf9db92700(0000) GS:ffff8880ba300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000005216b0 CR3: 000000008edc5000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 inline_listxattr drivers/staging/erofs/xattr.c:584 [inline]
 erofs_listxattr+0x125/0xd30 drivers/staging/erofs/xattr.c:653
 vfs_listxattr+0xd4/0x140 fs/xattr.c:392
 listxattr+0xcb/0xe0 fs/xattr.c:687
 path_listxattr+0xba/0x120 fs/xattr.c:711
 __do_sys_listxattr fs/xattr.c:723 [inline]
 __se_sys_listxattr fs/xattr.c:720 [inline]
 __x64_sys_listxattr+0x73/0xb0 fs/xattr.c:720
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4665d9
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007faf9db92188 EFLAGS: 00000246 ORIG_RAX: 00000000000000c2
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fff0ffb3b4f R14: 00007faf9db92300 R15: 0000000000022000
Modules linked in:
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
---[ end trace 504e4533e5dea231 ]---
RIP: 0010:inline_xattr_iter_begin+0x37a/0x4a0 drivers/staging/erofs/xattr.c:186
Code: 08 84 d2 0f 85 30 01 00 00 0f b7 43 ea 48 83 c4 18 5b 41 5c 44 29 e8 41 5d 41 5e 41 5f 5d c3 b8 c3 ff ff ff 0f 83 1e ff ff ff <0f> 0b 48 89 45 d0 e8 2b 77 aa fb 48 8b 45 d0 e9 0a fd ff ff 4c 89
RSP: 0018:ffff88808dae7c40 EFLAGS: 00010283
ieee80211 phy11: Selected rate control algorithm 'minstrel_ht'
RAX: 00000000ffffffc3 RBX: ffff888080e5a4c0 RCX: 0000000000000000
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
RDX: 0000000000000048 RSI: ffff888080e5a4c0 RDI: ffff888080e5a4ac
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
RBP: ffff88808dae7c80 R08: fffff940004c4677 R09: fffff940004c4676
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
R10: fffff940004c4676 R11: ffffea00026233b7 R12: ffff888080e5a498
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
R13: 0000000000000280 R14: ffff88808dae7d40 R15: ffff888080e5a4aa
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
FS:  00007faf9db92700(0000) GS:ffff8880ba300000(0000) knlGS:0000000000000000
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
CR2: 00007ffd56f6de8c CR3: 000000008edc5000 CR4: 00000000001406e0
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
erofs: read_super, device -> /dev/loop1
erofs: read_super, device -> /dev/loop5
erofs: options ->