general protection fault, probably for non-canonical address 0xdffffc00000000c5: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000628-0x000000000000062f] CPU: 1 PID: 7491 Comm: systemd-udevd Not tainted 5.12.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:bdev_read_page+0x2c/0x240 fs/block_dev.c:731 Code: 00 00 00 00 00 fc ff df 41 57 41 56 49 89 d6 41 55 41 54 55 48 8d af 28 06 00 00 48 89 ea 53 48 89 fb 48 c1 ea 03 48 83 ec 10 <80> 3c 02 00 48 89 34 24 0f 85 a3 01 00 00 4c 8b a3 28 06 00 00 48 RSP: 0018:ffffc90004d27428 EFLAGS: 00010286 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000014 RDX: 00000000000000c5 RSI: fff88f4127100000 RDI: 0000000000000000 RBP: 0000000000000628 R08: 0000000000000001 R09: ffffea0004116d87 R10: fffff94000822db0 R11: 0000000000000000 R12: ffffc90004d27638 R13: fff88f4127100000 R14: ffffea0004116d80 R15: 0000000000000000 FS: 00007fdd142758c0(0000) GS:ffff8881f6500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc79ffc4d58 CR3: 00000001118b4003 CR4: 00000000001706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_mpage_readpage+0xd59/0x18c0 fs/mpage.c:302 mpage_readahead+0x2c0/0x6c0 fs/mpage.c:389 read_pages+0x1b0/0x7c0 mm/readahead.c:130 page_cache_ra_unbounded+0x456/0x790 mm/readahead.c:238 do_page_cache_ra mm/readahead.c:267 [inline] force_page_cache_ra+0x301/0x530 mm/readahead.c:299 page_cache_sync_readahead include/linux/pagemap.h:874 [inline] filemap_get_pages+0x258/0x1430 mm/filemap.c:2483 filemap_read+0x261/0xb50 mm/filemap.c:2566 call_read_iter include/linux/fs.h:2110 [inline] new_sync_read+0x35a/0x5f0 fs/read_write.c:415 vfs_read+0x264/0x470 fs/read_write.c:496 ksys_read+0xf4/0x1d0 fs/read_write.c:634 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fdd133bb210 Code: 73 01 c3 48 8b 0d 98 7d 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d b9 c1 20 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 4e fc ff ff 48 89 04 24 RSP: 002b:00007ffcf4478768 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 000055d240a9ae60 RCX: 00007fdd133bb210 RDX: 0000000000000400 RSI: 000055d240a9ae88 RDI: 000000000000000f RBP: 000055d240a9bf70 R08: 00007fdd133a5f78 R09: 0000000000000430 R10: 000000000000006d R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000400 R14: 000055d240a9bfc0 R15: 0000000000000400 Modules linked in: ---[ end trace 7daa5f3e72072da7 ]--- RIP: 0010:bdev_read_page+0x2c/0x240 fs/block_dev.c:731 Code: 00 00 00 00 00 fc ff df 41 57 41 56 49 89 d6 41 55 41 54 55 48 8d af 28 06 00 00 48 89 ea 53 48 89 fb 48 c1 ea 03 48 83 ec 10 <80> 3c 02 00 48 89 34 24 0f 85 a3 01 00 00 4c 8b a3 28 06 00 00 48 RSP: 0018:ffffc90004d27428 EFLAGS: 00010286 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000014 RDX: 00000000000000c5 RSI: fff88f4127100000 RDI: 0000000000000000 RBP: 0000000000000628 R08: 0000000000000001 R09: ffffea0004116d87 R10: fffff94000822db0 R11: 0000000000000000 R12: ffffc90004d27638 R13: fff88f4127100000 R14: ffffea0004116d80 R15: 0000000000000000 FS: 00007fdd142758c0(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1ad8dbc000 CR3: 00000001118b4003 CR4: 00000000001706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400