general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 1 PID: 16628 Comm: syz-executor.3 Not tainted 5.9.0-rc5-next-20200914-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:shmem_getpage_gfp+0xac6/0x2400 mm/shmem.c:1995
Code: 00 00 e8 ad ce d5 ff 83 fb 04 0f 85 e3 06 00 00 e8 1f d2 d5 ff 49 8d 7e 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 c5 17 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b
RSP: 0018:ffffc900057f7910 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000f076000
RDX: 0000000000000004 RSI: ffffffff819cf951 RDI: 0000000000000020
RBP: ffff888058d877c8 R08: 0000000000000001 R09: ffff888060c4ea48
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888058d877a0 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f1b0e91f700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000531101 CR3: 00000000a2236000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
shmem_getpage mm/shmem.c:155 [inline]
shmem_undo_range+0xb61/0x1a80 mm/shmem.c:961
shmem_truncate_range mm/shmem.c:1058 [inline]
shmem_setattr+0x67a/0xc70 mm/shmem.c:1117
notify_change+0xb60/0x10a0 fs/attr.c:336
do_truncate+0x134/0x1f0 fs/open.c:64
vfs_truncate+0x49e/0x600 fs/open.c:110
do_sys_truncate.part.0+0x11e/0x140 fs/open.c:133
do_sys_truncate fs/open.c:127 [inline]
__do_sys_truncate fs/open.c:145 [inline]
__se_sys_truncate fs/open.c:143 [inline]
__x64_sys_truncate+0x69/0x90 fs/open.c:143
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5f9
Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f1b0e91ec78 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00000000000363c0 RCX: 000000000045d5f9
RDX: 0000000000000000 RSI: 0000000000208002 RDI: 0000000020000080
RBP: 000000000118d018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cfec
R13: 00007ffe8359da5f R14: 00007f1b0e91f9c0 R15: 000000000118cfec
Modules linked in:
---[ end trace 02d45238130250b9 ]---
RIP: 0010:shmem_getpage_gfp+0xac6/0x2400 mm/shmem.c:1995
Code: 00 00 e8 ad ce d5 ff 83 fb 04 0f 85 e3 06 00 00 e8 1f d2 d5 ff 49 8d 7e 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 c5 17 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b
RSP: 0018:ffffc900057f7910 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000f076000
RDX: 0000000000000004 RSI: ffffffff819cf951 RDI: 0000000000000020
RBP: ffff888058d877c8 R08: 0000000000000001 R09: ffff888060c4ea48
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888058d877a0 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f1b0e91f700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000747698 CR3: 00000000a2236000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400