BUG: unable to handle page fault for address: ffff88821978a340
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD e201067 P4D e201067 PUD e204067 PMD 118063 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 3924 Comm: systemd-udevd Not tainted 5.9.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:qlist_free_all+0x3d/0x170 mm/kasan/quarantine.c:166
Code: 37 48 85 f6 0f 84 36 01 00 00 49 bf 00 00 00 00 00 fc ff df 48 85 ed 49 89 fd 48 89 ef 0f 84 97 00 00 00 48 63 87 80 00 00 00 <4c> 8b 26 48 29 c6 48 83 3d 75 52 45 08 00 0f 84 11 01 00 00 9c 58
RSP: 0018:ffffc900037f7bf8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000286 RCX: ffffea00082c7007
RDX: 0000000000000000 RSI: ffff88821978a340 RDI: ffff88821bc47a00
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8d0c2a6f
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88821978a340
R13: ffffc900037f7c40 R14: 0000000000000200 R15: dffffc0000000000
FS:  00007fa5f72998c0(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88821978a340 CR3: 00000000a19bb000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 quarantine_reduce+0x17e/0x200 mm/kasan/quarantine.c:261
 __kasan_kmalloc.constprop.0+0x9e/0xd0 mm/kasan/common.c:442
 slab_post_alloc_hook mm/slab.h:518 [inline]
 slab_alloc_node mm/slab.c:3258 [inline]
 kmem_cache_alloc_node_trace+0x144/0x430 mm/slab.c:3596
 __do_kmalloc_node mm/slab.c:3618 [inline]
 __kmalloc_node+0x38/0x60 mm/slab.c:3626
 kmalloc_node include/linux/slab.h:577 [inline]
 kvmalloc_node+0x61/0xf0 mm/util.c:574
 kvmalloc include/linux/mm.h:757 [inline]
 seq_buf_alloc fs/seq_file.c:34 [inline]
 seq_read+0x743/0x1070 fs/seq_file.c:183
 kernfs_fop_read+0xe9/0x590 fs/kernfs/file.c:251
 vfs_read+0x1df/0x5a0 fs/read_write.c:479
 ksys_read+0x12d/0x250 fs/read_write.c:615
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fa5f610c910
Code: b6 fe ff ff 48 8d 3d 0f be 08 00 48 83 ec 08 e8 06 db 01 00 66 0f 1f 44 00 00 83 3d f9 2d 2c 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 de 9b 01 00 48 89 04 24
RSP: 002b:00007ffd18f332d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000557fd401c240 RCX: 00007fa5f610c910
RDX: 0000000000001000 RSI: 0000557fd401a120 RDI: 000000000000000e
RBP: 00007fa5f63c7440 R08: 00007fa5f63cb2d8 R09: 0000000000001010
R10: 0000557fd401c240 R11: 0000000000000246 R12: 0000000000001000
R13: 0000000000000d68 R14: 0000557fd401a120 R15: 00007fa5f63c6900
Modules linked in:
CR2: ffff88821978a340
---[ end trace 0c56a483a3ef190f ]---
RIP: 0010:qlist_free_all+0x3d/0x170 mm/kasan/quarantine.c:166
Code: 37 48 85 f6 0f 84 36 01 00 00 49 bf 00 00 00 00 00 fc ff df 48 85 ed 49 89 fd 48 89 ef 0f 84 97 00 00 00 48 63 87 80 00 00 00 <4c> 8b 26 48 29 c6 48 83 3d 75 52 45 08 00 0f 84 11 01 00 00 9c 58
RSP: 0018:ffffc900037f7bf8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000286 RCX: ffffea00082c7007
RDX: 0000000000000000 RSI: ffff88821978a340 RDI: ffff88821bc47a00
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8d0c2a6f
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88821978a340
R13: ffffc900037f7c40 R14: 0000000000000200 R15: dffffc0000000000
FS:  00007fa5f72998c0(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88821978a340 CR3: 00000000a19bb000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600