EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. isofs_fill_super: bread failed, dev=loop2, iso_blknum=16, block=32 netlink: 72 bytes leftover after parsing attributes in process `syz-executor.5'. Oops: general protection fault, probably for non-canonical address 0xdffffc0000000032: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000190-0x0000000000000197] CPU: 1 UID: 0 PID: 288 Comm: syz-executor.6 Tainted: G W 6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:perf_tp_event+0x175/0xe70 Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01 RSP: 0000:ffff88801a00f640 EFLAGS: 00010012 RAX: 0000000000000032 RBX: ffffffffffffffa1 RCX: 0000000000000002 RDX: ffff88800f28d280 RSI: ffffffff818995b7 RDI: 0000000000000191 RBP: ffff88801a00f8b0 R08: ffff88806cf313e8 R09: ffffe8ffffd0e460 R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000 R13: 000000000000002c R14: ffff88806cf313e8 R15: dffffc0000000000 FS: 0000555594d20400(0000) GS:ffff8880e56dd000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d42a000 CR3: 0000000046a11000 CR4: 0000000000350ef0 Call Trace: perf_trace_run_bpf_submit+0xef/0x180 perf_trace_lock+0x337/0x5d0 lock_release+0x1ab/0x290 _raw_spin_unlock_irqrestore+0x1a/0x50 __folio_end_writeback+0x5b3/0xae0 folio_end_writeback+0x11f/0x430 ext4_finish_bio+0x709/0x940 ext4_end_bio+0x14b/0x580 bio_endio+0x5ad/0x6b0 blk_update_request+0x2c5/0x1060 scsi_end_request+0x7a/0xa00 scsi_io_completion+0xbf/0x1640 scsi_complete+0x114/0x380 blk_complete_reqs+0xb2/0xf0 handle_softirqs+0x1b1/0x770 __irq_exit_rcu+0xc4/0x100 irq_exit_rcu+0x9/0x20 sysvec_call_function_single+0x64/0xc0 asm_sysvec_call_function_single+0x1a/0x20 RIP: 0033:0x7f0bed6c6fb7 Code: 89 7c 24 10 48 89 4c 24 18 e8 d5 50 02 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 05 51 02 00 8b 44 RSP: 002b:00007ffed5657ac0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 000000000000000a RCX: 00007f0bed6c6fb7 RDX: 0000000040000001 RSI: 00007ffed5657b4c RDI: 00000000ffffffff RBP: 00007ffed5657b4c R08: 0000000000000000 R09: 00007f0bed7b8000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 0000000000024eb5 R14: 0000000000000013 R15: 00007ffed5657bb0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:perf_tp_event+0x175/0xe70 Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01 RSP: 0000:ffff88801a00f640 EFLAGS: 00010012 RAX: 0000000000000032 RBX: ffffffffffffffa1 RCX: 0000000000000002 RDX: ffff88800f28d280 RSI: ffffffff818995b7 RDI: 0000000000000191 RBP: ffff88801a00f8b0 R08: ffff88806cf313e8 R09: ffffe8ffffd0e460 R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000 R13: 000000000000002c R14: ffff88806cf313e8 R15: dffffc0000000000 FS: 0000555594d20400(0000) GS:ffff8880e56dd000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d42a000 CR3: 0000000046a11000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: df 48 89 fisttps -0x77(%rax) 3: 85 a8 fd ff ff 48 test %ebp,0x48fffffd(%rax) 9: c1 e8 03 shr $0x3,%eax c: 4c 01 e0 add %r12,%rax f: 48 89 85 c8 fd ff ff mov %rax,-0x238(%rbp) 16: e8 c9 51 ea ff callq 0xffea51e4 1b: 48 8d bb f0 01 00 00 lea 0x1f0(%rbx),%rdi 22: 48 89 f8 mov %rdi,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 74 08 je 0x3a 32: 3c 03 cmp $0x3,%al 34: 0f 8e c5 0b 00 00 jle 0xbff 3a: 44 rex.R 3b: 8b .byte 0x8b 3c: ab stos %eax,%es:(%rdi) 3d: f0 lock 3e: 01 .byte 0x1