program: r0 = bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=@base={0x1f, 0x0, 0x0, 0x1000, 0x0, 0x1, 0x0, '\x00', 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, @void, @value, @void, @value}, 0x48) syz_mount_image$squashfs(&(0x7f0000000240), &(0x7f0000000280)='./file0\x00', 0x0, &(0x7f00000002c0), 0x1, 0x22c, &(0x7f0000000000)="$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") perf_event_open(&(0x7f0000000040)={0x2, 0x80, 0xc4, 0x1, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_config_ext={0x5, 0x7ffffffe}, 0x0, 0x0, 0xffffffff, 0x4, 0x0, 0x1000000, 0x0, 0x0, 0x0, 0x0, 0x3}, 0x0, 0x0, 0xffffffffffffffff, 0x9) mmap(&(0x7f0000ffd000/0x3000)=nil, 0x3000, 0x100000f, 0x28011, r0, 0x1000) r1 = syz_open_procfs(0x0, &(0x7f00000001c0)='maps\x00') ioctl$KVM_SET_USER_MEMORY_REGION(r1, 0xc0686611, &(0x7f0000000180)={0x68, 0x0, 0x3f, 0x2000, &(0x7f0000ffe000/0x2000)=nil}) [ 58.931880][ T5322] loop0: detected capacity change from 0 to 8 [ 58.994746][ T5322] SQUASHFS error: xz decompression failed, data probably corrupt [ 58.998551][ T5322] SQUASHFS error: Failed to read block 0x108: -5 [ 59.000964][ T5322] SQUASHFS error: Unable to read metadata cache entry [106] [ 59.003853][ T5322] SQUASHFS error: Unable to read inode 0x11f [ 59.043789][ T5322] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 59.046933][ T5322] #PF: supervisor instruction fetch in kernel mode [ 59.049381][ T5322] #PF: error_code(0x0010) - not-present page [ 59.051625][ T5322] PGD 42dd2067 P4D 42dd2067 PUD 40235067 PMD 0 [ 59.053962][ T5322] Oops: Oops: 0010 [#1] PREEMPT SMP KASAN NOPTI [ 59.056235][ T5322] CPU: 0 UID: 0 PID: 5322 Comm: syz.0.0 Not tainted 6.12.0-rc7-syzkaller-00187-gf868cd251776 #0 [ 59.059949][ T5322] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 59.063908][ T5322] RIP: 0010:0x0 [ 59.065267][ T5322] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 59.067950][ T5322] RSP: 0018:ffffc9000d2d78d8 EFLAGS: 00010287 [ 59.070176][ T5322] RAX: ffffffff81cddebc RBX: 0000000000000000 RCX: 0000000000040000 [ 59.073140][ T5322] RDX: ffffc9000d982000 RSI: ffffea0000464640 RDI: ffff888033c5ce00 [ 59.076013][ T5322] RBP: ffffc9000d2d7990 R08: ffffffff81cdde86 R09: 1ffffd400008c8c8 [ 59.078952][ T5322] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffffd400008c8c8 [ 59.081827][ T5322] R13: ffffea0000464640 R14: ffffc9000d2d7920 R15: 1ffffd400008c8c9 [ 59.085201][ T5322] FS: 00007f7576d616c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 [ 59.088475][ T5322] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.090824][ T5322] CR2: ffffffffffffffd6 CR3: 000000004440c000 CR4: 0000000000352ef0 [ 59.093823][ T5322] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.096592][ T5322] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.099392][ T5322] Call Trace: [ 59.100648][ T5322] [ 59.101750][ T5322] ? __die_body+0x5f/0xb0 [ 59.103465][ T5322] ? page_fault_oops+0x8e4/0xcc0 [ 59.105366][ T5322] ? __pfx_page_fault_oops+0x10/0x10 [ 59.107483][ T5322] ? __pfx_lock_acquire+0x10/0x10 [ 59.109486][ T5322] ? __folio_batch_add_and_move+0x81a/0xf00 [ 59.111554][ T5322] ? __pfx_lock_release+0x10/0x10 [ 59.113433][ T5322] ? rcu_is_watching+0x15/0xb0 [ 59.115237][ T5322] ? rcu_is_watching+0x15/0xb0 [ 59.116986][ T5322] ? is_errata93+0xbe/0x260 [ 59.118684][ T5322] ? exc_page_fault+0x5ed/0x8c0 [ 59.120519][ T5322] ? asm_exc_page_fault+0x26/0x30 [ 59.122374][ T5322] ? filemap_read_folio+0x106/0x630 [ 59.124349][ T5322] ? filemap_read_folio+0x13c/0x630 [ 59.126284][ T5322] filemap_read_folio+0x14b/0x630 [ 59.128227][ T5322] ? __pfx_filemap_read_folio+0x10/0x10 [ 59.130358][ T5322] ? __filemap_get_folio+0x949/0xbd0 [ 59.132302][ T5322] do_read_cache_folio+0x3f5/0x850 [ 59.134187][ T5322] freader_get_folio+0x57a/0xb50 [ 59.136038][ T5322] freader_fetch+0x9d/0x650 [ 59.137711][ T5322] ? mt_find+0x2a9/0x920 [ 59.139228][ T5322] __build_id_parse+0x188/0x8a0 [ 59.141040][ T5322] ? __pfx___build_id_parse+0x10/0x10 [ 59.142957][ T5322] ? __might_fault+0xc6/0x120 [ 59.144662][ T5322] procfs_procmap_ioctl+0xcf5/0x1600 [ 59.146558][ T5322] ? __pfx_procfs_procmap_ioctl+0x10/0x10 [ 59.148653][ T5322] ? __fget_files+0x29/0x470 [ 59.150412][ T5322] ? __pfx_procfs_procmap_ioctl+0x10/0x10 [ 59.152570][ T5322] __se_sys_ioctl+0xf9/0x170 [ 59.154349][ T5322] do_syscall_64+0xf3/0x230 [ 59.156031][ T5322] ? clear_bhb_loop+0x35/0x90 [ 59.157790][ T5322] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 59.159992][ T5322] RIP: 0033:0x7f7575f7e719 [ 59.161666][ T5322] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 [ 59.168758][ T5322] RSP: 002b:00007f7576d61038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 59.172025][ T5322] RAX: ffffffffffffffda RBX: 00007f7576135f80 RCX: 00007f7575f7e719 [ 59.175083][ T5322] RDX: 0000000020000180 RSI: 00000000c0686611 RDI: 0000000000000005 [ 59.178111][ T5322] RBP: 00007f7575ff175e R08: 0000000000000000 R09: 0000000000000000 [ 59.181083][ T5322] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 59.184044][ T5322] R13: 0000000000000000 R14: 00007f7576135f80 R15: 00007fffa726a738 [ 59.187099][ T5322] [ 59.188292][ T5322] Modules linked in: [ 59.189765][ T5322] CR2: 0000000000000000 [ 59.191254][ T5322] ---[ end trace 0000000000000000 ]--- [ 59.193273][ T5322] RIP: 0010:0x0 [ 59.194669][ T5322] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 59.197408][ T5322] RSP: 0018:ffffc9000d2d78d8 EFLAGS: 00010287 [ 59.199594][ T5322] RAX: ffffffff81cddebc RBX: 0000000000000000 RCX: 0000000000040000 [ 59.202470][ T5322] RDX: ffffc9000d982000 RSI: ffffea0000464640 RDI: ffff888033c5ce00 [ 59.205173][ T5322] RBP: ffffc9000d2d7990 R08: ffffffff81cdde86 R09: 1ffffd400008c8c8 [ 59.207854][ T5322] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffffd400008c8c8 [ 59.210608][ T5322] R13: ffffea0000464640 R14: ffffc9000d2d7920 R15: 1ffffd400008c8c9 [ 59.213586][ T5322] FS: 00007f7576d616c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 [ 59.216843][ T5322] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.219301][ T5322] CR2: ffffffffffffffd6 CR3: 000000004440c000 CR4: 0000000000352ef0 [ 59.222335][ T5322] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.225421][ T5322] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.228418][ T5322] Kernel panic - not syncing: Fatal exception [ 59.231006][ T5322] Kernel Offset: disabled [ 59.232647][ T5322] Rebooting in 86400 seconds..