kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 416 Comm: udevd Not tainted 5.4.281-syzkaller-04949-gc8a568fb88e9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:bdev_read_page+0x37/0x190 fs/block_dev.c:707 Code: 10 49 89 d5 48 89 74 24 08 49 89 fc 49 bf 00 00 00 00 00 fc ff df e8 88 0c ba ff 49 8d 9c 24 80 00 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 2a f3 e9 ff bd d0 04 00 00 48 03 RSP: 0018:ffff8881f52c73b8 EFLAGS: 00010202 RAX: 0000000000000010 RBX: 0000000000000080 RCX: ffff8881f5cd9f80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8881f52c75d0 R08: ffffffff81ab61b6 R09: fffff94000f87931 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: ffffea0007c3c980 R14: 0000000000000014 R15: dffffc0000000000 FS: 00007f74ab27dc80(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fe51e182f8 CR3: 00000001e3076000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_mpage_readpage+0x1458/0x1b20 fs/mpage.c:338 mpage_readpages+0x36e/0x500 fs/mpage.c:440 read_pages+0x119/0x400 mm/readahead.c:126 __do_page_cache_readahead+0x448/0x4f0 mm/readahead.c:212 force_page_cache_readahead mm/readahead.c:243 [inline] page_cache_sync_readahead+0x3f0/0x460 mm/readahead.c:522 generic_file_buffered_read mm/filemap.c:2209 [inline] generic_file_read_iter+0x673/0x21f0 mm/filemap.c:2482 blkdev_read_iter+0x12a/0x180 fs/block_dev.c:2043 call_read_iter include/linux/fs.h:1983 [inline] new_sync_read fs/read_write.c:414 [inline] __vfs_read+0x5cd/0x730 fs/read_write.c:427 vfs_read+0x148/0x360 fs/read_write.c:461 ksys_read+0x199/0x2c0 fs/read_write.c:587 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7f74ab3a8b6a Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffe7ccacc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f74ab3a8b6a RDX: 0000000000000400 RSI: 000055fe51de32f8 RDI: 0000000000000009 RBP: 0000000000000400 R08: 000055fe51de32d0 R09: 0000000000000008 R10: 0000000000000051 R11: 0000000000000246 R12: 000055fe51de32d0 R13: 000055fe51de32e8 R14: 000055fe51de1518 R15: 000055fe51de14c0 Modules linked in: ---[ end trace 16a849a8f43f8376 ]--- RIP: 0010:bdev_read_page+0x37/0x190 fs/block_dev.c:707 Code: 10 49 89 d5 48 89 74 24 08 49 89 fc 49 bf 00 00 00 00 00 fc ff df e8 88 0c ba ff 49 8d 9c 24 80 00 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 2a f3 e9 ff bd d0 04 00 00 48 03 RSP: 0018:ffff8881f52c73b8 EFLAGS: 00010202 RAX: 0000000000000010 RBX: 0000000000000080 RCX: ffff8881f5cd9f80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8881f52c75d0 R08: ffffffff81ab61b6 R09: fffff94000f87931 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: ffffea0007c3c980 R14: 0000000000000014 R15: dffffc0000000000 FS: 00007f74ab27dc80(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffca449a7a8 CR3: 00000001e3076000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 49 89 d5 mov %rdx,%r13 3: 48 89 74 24 08 mov %rsi,0x8(%rsp) 8: 49 89 fc mov %rdi,%r12 b: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 12: fc ff df 15: e8 88 0c ba ff call 0xffba0ca2 1a: 49 8d 9c 24 80 00 00 lea 0x80(%r12),%rbx 21: 00 22: 48 89 d8 mov %rbx,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 df mov %rbx,%rdi 33: e8 2a f3 e9 ff call 0xffe9f362 38: bd d0 04 00 00 mov $0x4d0,%ebp 3d: 48 rex.W 3e: 03 .byte 0x3