bisecting fixing commit since 62d18ecfa64137349fac9c5817784fbd48b54f48
building syzkaller on f48c20b8f9b2a6c26629f11cc15e1c9c316572c8
testing commit 62d18ecfa64137349fac9c5817784fbd48b54f48 with gcc (GCC) 8.1.0
kernel signature: 648177ff333cee6cd548b0e8b595a4182ebd64fdeb7e2ae9108c73d4db131caf
run #0: crashed: BUG: unable to handle kernel
run #1: crashed: BUG: unable to handle kernel paging request in cleanup_bitmap_list
run #2: crashed: BUG: unable to handle kernel paging request in cleanup_bitmap_list
run #3: crashed: BUG: unable to handle kernel paging request in cleanup_bitmap_list
run #4: crashed: BUG: unable to handle kernel paging request in cleanup_bitmap_list
run #5: crashed: BUG: unable to handle kernel paging request in cleanup_bitmap_list
run #6: crashed: BUG: unable to handle kernel paging request in cleanup_bitmap_list
run #7: crashed: BUG: unable to handle kernel
run #8: crashed: BUG: unable to handle kernel paging request in cleanup_bitmap_list
run #9: crashed: BUG: unable to handle kernel paging request in cleanup_bitmap_list
testing current HEAD 4ef8451b332662d004df269d4cdeb7d9f31419b5
testing commit 4ef8451b332662d004df269d4cdeb7d9f31419b5 with gcc (GCC) 8.1.0
kernel signature: 4af55f90633f1d3ed36196287c1991f04a89cffc0a0161cfbd982272620f0b0a
all runs: crashed: BUG: unable to handle kernel paging request in cleanup_bitmap_list
revisions tested: 2, total time: 17m3.787826665s (build: 8m31.919564951s, test: 7m45.259105509s)
the crash still happens on HEAD
commit msg: Merge tag 'perf-tools-for-v5.10-2020-11-03' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux
crash: BUG: unable to handle kernel paging request in cleanup_bitmap_list
REISERFS warning (device loop0): sh-458 journal_init_dev: cannot init journal device unknown-block(0,2048): -6
File: /dev/loop0 PID: 8810 Comm: syz-executor2
REISERFS (device loop4): using ordered data mode
REISERFS warning (device loop0): sh-462 journal_init: unable to initialize journal device
reiserfs: using flush barriers
BUG: unable to handle page fault for address: ffffc90000b3a000
REISERFS (device loop1): found reiserfs format "3.5" with non-standard journal
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 100000067 P4D 100000067 PUD 100143067 PMD 1009c8067 PTE 0
Oops: 0000 [#1] SMP
CPU: 1 PID: 8853 Comm: syz-executor Not tainted 5.10.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
REISERFS (device loop1): using ordered data mode
RIP: 0010:cleanup_bitmap_list.isra.13.part.14+0x9f/0x140 fs/reiserfs/journal.c:231
Code: 49 8b 41 08 4a 8d 0c d5 00 00 00 00 31 d2 83 c3 01 8b 00 83 e8 01 48 f7 f1 83 c0 01 39 d8 0f 86 8f 00 00 00 49 8b 07 4c 63 f3 <4e> 8b 2c f0 4d 85 ed 74 cd 4d 8b 61 18 4c 89 45 d0 41 83 ac 24 44
RSP: 0018:ffffc9000027bb50 EFLAGS: 00010206
reiserfs: using flush barriers

RAX: ffffc90000b39000 RBX: 0000000000000200 RCX: 0000000000008000
RDX: 0000000000007fff RSI: ffffc90000b712e0 RDI: ffff888111650000
RBP: ffffc9000027bb98 R08: ffff888111650000 R09: ffff88811158bc00
R10: 0000000000001000 R11: 0000000000000082 R12: ffffc90000b71330
R13: 0000000000000000 R14: 0000000000000200 R15: ffffc90000b712e0
FS:  00007f2eee368700(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90000b3a000 CR3: 0000000111763000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 cleanup_bitmap_list fs/reiserfs/journal.c:227 [inline]
 free_list_bitmaps+0x2f/0x60 fs/reiserfs/journal.c:249
 free_journal_ram+0x4e/0x110 fs/reiserfs/journal.c:1886
REISERFS (device loop2): found reiserfs format "3.5" with non-standard journal
 journal_init+0xfc/0x16f0 fs/reiserfs/journal.c:2892
REISERFS (device loop2): using ordered data mode
 reiserfs_fill_super+0x3d2/0xd50 fs/reiserfs/super.c:2032
 mount_bdev+0x197/0x1d0 fs/super.c:1419
reiserfs: using flush barriers
 get_super_block+0x10/0x20 fs/reiserfs/super.c:2606
 legacy_get_tree+0x2f/0x50 fs/fs_context.c:592
 vfs_get_tree+0x28/0xc0 fs/super.c:1549
 do_new_mount fs/namespace.c:2875 [inline]
 path_mount+0x765/0xaf0 fs/namespace.c:3205
REISERFS (device loop3): found reiserfs format "3.5" with non-standard journal
 do_mount+0x77/0x90 fs/namespace.c:3218
 __do_sys_mount fs/namespace.c:3426 [inline]
 __se_sys_mount fs/namespace.c:3403 [inline]
 __x64_sys_mount+0xc0/0xe0 fs/namespace.c:3403
 do_syscall_64+0x37/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
REISERFS (device loop5): found reiserfs format "3.5" with non-standard journal
RIP: 0033:0x45860a
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 5d 8f fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 3a 8f fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007f2eee367ba8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 000000000045860a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f2eee367bf0
RBP: 0000000000000001 R08: 0000000020013900 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000001 R14: 00000000006fed68 R15: 0000000000000000
Modules linked in:
CR2: ffffc90000b3a000
---[ end trace 8d4bc7c16bf22ffa ]---
RIP: 0010:cleanup_bitmap_list.isra.13.part.14+0x9f/0x140 fs/reiserfs/journal.c:231
Code: 49 8b 41 08 4a 8d 0c d5 00 00 00 00 31 d2 83 c3 01 8b 00 83 e8 01 48 f7 f1 83 c0 01 39 d8 0f 86 8f 00 00 00 49 8b 07 4c 63 f3 <4e> 8b 2c f0 4d 85 ed 74 cd 4d 8b 61 18 4c 89 45 d0 41 83 ac 24 44
RSP: 0018:ffffc9000027bb50 EFLAGS: 00010206
REISERFS warning (device loop1): sh-458 journal_init_dev: cannot init journal device unknown-block(0,2048): -6
RAX: ffffc90000b39000 RBX: 0000000000000200 RCX: 0000000000008000
RDX: 0000000000007fff RSI: ffffc90000b712e0 RDI: ffff888111650000
RBP: ffffc9000027bb98 R08: ffff888111650000 R09: ffff88811158bc00
R10: 0000000000001000 R11: 0000000000000082 R12: ffffc90000b71330
R13: 0000000000000000 R14: 0000000000000200 R15: ffffc90000b712e0
FS:  00007f2eee368700(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90000b3a000 CR3: 0000000111763000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
REISERFS warning (device loop1): sh-462 journal_init: unable to initialize journal device
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400