bisecting fixing commit since 6b7b0056defc6eb5c87bbe4690ccda547b2891aa
building syzkaller on 858ea628800647d5e5b68b11441e42b8ef5652c1
testing commit 6b7b0056defc6eb5c87bbe4690ccda547b2891aa
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 728cf78263ce4e129cb9c32a0238df62d67049b6b5e6f446efb8ad3f74fddd37
run #0: crashed: kernel BUG in inline_xattr_iter_begin
run #1: crashed: kernel BUG in inline_xattr_iter_begin
run #2: crashed: kernel BUG in inline_xattr_iter_begin
run #3: crashed: kernel BUG in inline_xattr_iter_begin
run #4: crashed: kernel BUG in inline_xattr_iter_begin
run #5: crashed: kernel BUG in inline_xattr_iter_begin
run #6: crashed: kernel BUG in inline_xattr_iter_begin
run #7: crashed: kernel BUG in inline_xattr_iter_begin
run #8: crashed: kernel BUG in inline_xattr_iter_begin
run #9: crashed: kernel BUG in inline_xattr_iter_begin
run #10: crashed: kernel BUG in inline_xattr_iter_begin
run #11: crashed: kernel BUG in inline_xattr_iter_begin
run #12: crashed: kernel BUG in inline_xattr_iter_begin
run #13: crashed: kernel BUG in inline_xattr_iter_begin
run #14: crashed: kernel BUG in inline_xattr_iter_begin
run #15: crashed: kernel BUG in corrupted
run #16: crashed: kernel BUG in inline_xattr_iter_begin
run #17: crashed: kernel BUG in inline_xattr_iter_begin
run #18: crashed: kernel BUG in inline_xattr_iter_begin
run #19: crashed: kernel BUG in inline_xattr_iter_begin
testing current HEAD 4938296e03bd227e5020d63d418956fe52baf97c
testing commit 4938296e03bd227e5020d63d418956fe52baf97c
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 73345a9c44f51380f44179e2bfc44971342a336e167de5c2cc2294d4df7373de
run #0: crashed: kernel BUG in corrupted
run #1: crashed: kernel BUG in inline_xattr_iter_begin
run #2: crashed: kernel BUG in inline_xattr_iter_begin
run #3: crashed: kernel BUG in inline_xattr_iter_begin
run #4: crashed: kernel BUG in inline_xattr_iter_begin
run #5: crashed: kernel BUG in inline_xattr_iter_begin
run #6: crashed: kernel BUG in inline_xattr_iter_begin
run #7: crashed: kernel BUG in inline_xattr_iter_begin
run #8: crashed: kernel BUG in corrupted
run #9: crashed: kernel BUG in inline_xattr_iter_begin
revisions tested: 2, total time: 30m46.853616269s (build: 21m25.143052454s, test: 8m46.627785109s)
the crash still happens on HEAD
commit msg: Linux 4.19.198
crash: kernel BUG in inline_xattr_iter_begin
erofs: options -> 
erofs: root inode @ nid 36
erofs: mounted on /dev/loop3 with opts: .
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
------------[ cut here ]------------
kernel BUG at drivers/staging/erofs/xattr.c:186!
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 9876 Comm: syz-executor.3 Not tainted 4.19.198-syzkaller #0
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
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 1b 51 aa fb 48 8b 45 d0 e9 0a fd ff ff 4c 89
RSP: 0018:ffff88808df27c40 EFLAGS: 00010283
RAX: 00000000ffffffc3 RBX: ffff8880812444c0 RCX: 0000000000000000
RDX: 0000000000000048 RSI: ffff8880812444c0 RDI: ffff8880812444ac
RBP: ffff88808df27c80 R08: fffff9400040a38f R09: fffff9400040a38e
R10: fffff9400040a38e R11: ffffea0002051c77 R12: ffff888081244498
R13: 0000000000000280 R14: ffff88808df27d40 R15: ffff8880812444aa
FS:  00007f932caec700(0000) GS:ffff8880ba200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d8a66d27d0 CR3: 00000000992c1000 CR4: 00000000001406f0
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
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
 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
ieee80211 phy11: Selected rate control algorithm 'minstrel_ht'
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:00007f932caec188 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: 00007fffb26672ff R14: 00007f932caec300 R15: 0000000000022000
Modules linked in:
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
erofs: read_super, device -> /dev/loop2
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
erofs: options -> 
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
erofs: root inode @ nid 36
---[ end trace 37fc00aa0c5d3358 ]---
erofs: mounted on /dev/loop2 with opts: .
RIP: 0010:inline_xattr_iter_begin+0x37a/0x4a0 drivers/staging/erofs/xattr.c:186
------------[ cut here ]------------
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
kernel BUG at drivers/staging/erofs/xattr.c:186!
invalid opcode: 0000 [#2] PREEMPT SMP KASAN
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 1b 51 aa fb 48 8b 45 d0 e9 0a fd ff ff 4c 89
CPU: 0 PID: 9914 Comm: syz-executor.2 Tainted: G      D           4.19.198-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 1b 51 aa fb 48 8b 45 d0 e9 0a fd ff ff 4c 89
RSP: 0018:ffff88809f0ffc40 EFLAGS: 00010283
RAX: 00000000ffffffc3 RBX: ffff88808124d958 RCX: 0000000000000000
RDX: 0000000000000048 RSI: ffff88808124d958 RDI: ffff88808124d944
RBP: ffff88809f0ffc80 R08: fffff94000555f3f R09: fffff94000555f3e
R10: fffff94000555f3e R11: ffffea0002aaf9f7 R12: ffff88808124d930
R13: 0000000000000280 R14: ffff88809f0ffd40 R15: ffff88808124d942
FS:  00007efc6ff27700(0000) GS:ffff8880ba200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd7dd8bff8 CR3: 000000009dba6000 CR4: 00000000001406f0
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:00007efc6ff27188 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: 00007ffdce0b023f R14: 00007efc6ff27300 R15: 0000000000022000
Modules linked in:
---[ end trace 37fc00aa0c5d3359 ]---
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
RIP: 0010:inline_xattr_iter_begin+0x37a/0x4a0 drivers/staging/erofs/xattr.c:186
RSP: 0018:ffff88808df27c40 EFLAGS: 00010283
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 1b 51 aa fb 48 8b 45 d0 e9 0a fd ff ff 4c 89
Bluetooth: hci3: command 0x0419 tx timeout
RSP: 0018:ffff88808df27c40 EFLAGS: 00010283
RAX: 00000000ffffffc3 RBX: ffff8880812444c0 RCX: 0000000000000000
RAX: 00000000ffffffc3 RBX: ffff8880812444c0 RCX: 0000000000000000
Bluetooth: hci2: command 0x0419 tx timeout
erofs: read_super, device -> /dev/loop1
erofs: read_super, device -> /dev/loop5
RDX: 0000000000000048 RSI: ffff8880812444c0 RDI: ffff8880812444ac
Bluetooth: hci1: command 0x0419 tx timeout
ieee80211 phy12: Selected rate control algorithm 'minstrel_ht'
erofs: options -> 
ieee80211 phy13: Selected rate control algorithm 'minstrel_ht'
Bluetooth: hci0: command 0x0419 tx timeout
RDX: 0000000000000048 RSI: ffff8880812444c0 RDI: ffff8880812444ac
Bluetooth: hci5: command 0x0419 tx timeout
RBP: ffff88808df27c80 R08: fffff9400040a38f R09: fffff9400040a38e
erofs: root inode @ nid 36
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Bluetooth: hci4: command 0x0419 tx timeout
erofs: options -> 
erofs: mounted on /dev/loop5 with opts: .
ieee80211 phy14: Selected rate control algorithm 'minstrel_ht'
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
R10: fffff9400040a38e R11: ffffea0002051c77 R12: ffff888081244498
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
RBP: ffff88808df27c80 R08: fffff9400040a38f R09: fffff9400040a38e
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
R10: fffff9400040a38e R11: ffffea0002051c77 R12: ffff888081244498
erofs: root inode @ nid 36
R13: 0000000000000280 R14: ffff88808df27d40 R15: ffff8880812444aa
erofs: unmounted for /dev/loop5
FS:  00007f932caec700(0000) GS:ffff8880ba300000(0000) knlGS:0000000000000000
erofs: mounted on /dev/loop1 with opts: .
R13: 0000000000000280 R14: ffff88808df27d40 R15: ffff8880812444aa
erofs: unmounted for /dev/loop1
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
FS:  00007efc6ff27700(0000) GS:ffff8880ba300000(0000) knlGS:0000000000000000
IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055dc81254a38 CR3: 00000000992c1000 CR4: 00000000001406e0
ieee80211 phy15: Selected rate control algorithm 'minstrel_ht'
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50