./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3303292178
<...>
Warning: Permanently added '10.128.10.56' (ECDSA) to the list of known hosts.
execve("./syz-executor3303292178", ["./syz-executor3303292178"], 0x7fff60bb0e10 /* 10 vars */) = 0
brk(NULL) = 0x555555fac000
brk(0x555555facc40) = 0x555555facc40
arch_prctl(ARCH_SET_FS, 0x555555fac300) = 0
uname({sysname="Linux", nodename="syzkaller", ...}) = 0
readlink("/proc/self/exe", "/root/syz-executor3303292178", 4096) = 28
brk(0x555555fcdc40) = 0x555555fcdc40
brk(0x555555fce000) = 0x555555fce000
mprotect(0x7f26fde94000, 16384, PROT_READ) = 0
mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000
mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000
mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5077 attached
, child_tidptr=0x555555fac5d0) = 5077
[pid 5077] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5077] setpgid(0, 0) = 0
[pid 5077] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5077] write(3, "1000", 4) = 4
[pid 5077] close(3) = 0
[pid 5077] openat(AT_FDCWD, "/dev/snd/midiC2D0", O_WRONLY|O_NOCTTY|O_SYNC|O_NOATIME) = 3
[pid 5077] io_uring_setup(1496, {flags=0, sq_thread_cpu=0, sq_thread_idle=0, sq_entries=2048, cq_entries=4096, features=IORING_FEAT_SINGLE_MMAP|IORING_FEAT_NODROP|IORING_FEAT_SUBMIT_STABLE|IORING_FEAT_RW_CUR_POS|IORING_FEAT_CUR_PERSONALITY|IORING_FEAT_FAST_POLL|IORING_FEAT_POLL_32BITS|IORING_FEAT_SQPOLL_NONFIXED|IORING_FEAT_EXT_ARG|IORING_FEAT_NATIVE_WORKERS|IORING_FEAT_RSRC_TAGS|IORING_FEAT_CQE_SKIP|IORING_FEAT_LINKED_FILE, sq_off={head=0, tail=64, ring_mask=256, ring_entries=264, flags=276, dropped=272, array=65856}, cq_off={head=128, tail=192, ring_mask=260, ring_entries=268, overflow=284, cqes=320, flags=280}}) = 4
[pid 5077] mmap(0x20ee8000, 74048, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE, 4, 0) = 0x20ee8000
[pid 5077] mmap(0x20ffe000, 131072, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE, 4, 0x10000000) = 0x20ffe000
[pid 5077] io_uring_enter(4, 17678, 0, 0, NULL, 0) = 1
[pid 5077] dup(3) = 5
[pid 5077] write(5, "\x30\x80\xee\x20\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x2f\x64\x65\x76\x2f\x73\x6e\x64\x2f\x6d\x69\x64\x69\x43\x23\x44\x23\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 4294966572) = 4096
[pid 5077] exit_group(0) = ?
[ 70.380082][ T5077] ==================================================================
[ 70.388188][ T5077] BUG: KASAN: use-after-free in io_fallback_tw+0x6d/0x119
[ 70.395317][ T5077] Read of size 8 at addr ffff88807abfa948 by task syz-executor330/5077
[ 70.403549][ T5077]
[ 70.405890][ T5077] CPU: 0 PID: 5077 Comm: syz-executor330 Not tainted 6.2.0-rc3-next-20230112-syzkaller #0
[ 70.415763][ T5077] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
[ 70.425803][ T5077] Call Trace:
[ 70.429067][ T5077]
[ 70.431984][ T5077] dump_stack_lvl+0xd1/0x138
[ 70.436573][ T5077] print_report+0x15e/0x45d
[ 70.441065][ T5077] ? __phys_addr+0xc8/0x140
[ 70.445562][ T5077] ? io_fallback_tw+0x6d/0x119
[ 70.450328][ T5077] kasan_report+0xc0/0xf0
[ 70.454674][ T5077] ? io_fallback_tw+0x6d/0x119
[ 70.459453][ T5077] io_fallback_tw+0x6d/0x119
[ 70.464052][ T5077] tctx_task_work.cold+0xf/0x2c
[ 70.468900][ T5077] ? handle_tw_list+0x460/0x460
[ 70.473755][ T5077] ? lock_downgrade+0x6e0/0x6e0
[ 70.478618][ T5077] ? do_raw_spin_lock+0x124/0x2b0
[ 70.483634][ T5077] ? rwlock_bug.part.0+0x90/0x90
[ 70.488573][ T5077] ? _raw_spin_unlock_irq+0x23/0x50
[ 70.493794][ T5077] task_work_run+0x16f/0x270
[ 70.498379][ T5077] ? task_work_cancel+0x30/0x30
[ 70.503233][ T5077] ? do_raw_spin_unlock+0x175/0x230
[ 70.508447][ T5077] do_exit+0xb17/0x2a90
[ 70.512599][ T5077] ? lock_downgrade+0x6e0/0x6e0
[ 70.517435][ T5077] ? do_raw_spin_lock+0x124/0x2b0
[ 70.522447][ T5077] ? mm_update_next_owner+0x7b0/0x7b0
[ 70.527823][ T5077] ? rwlock_bug.part.0+0x90/0x90
[ 70.532777][ T5077] ? _raw_spin_unlock_irq+0x23/0x50
[ 70.537982][ T5077] do_group_exit+0xd4/0x2a0
[ 70.542507][ T5077] __x64_sys_exit_group+0x3e/0x50
[ 70.547517][ T5077] do_syscall_64+0x39/0xb0
[ 70.551936][ T5077] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 70.557865][ T5077] RIP: 0033:0x7f26fde261c9
[ 70.562282][ T5077] Code: Unable to access opcode bytes at 0x7f26fde2619f.
[ 70.569289][ T5077] RSP: 002b:00007ffd89d4d7f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[ 70.577705][ T5077] RAX: ffffffffffffffda RBX: 00007f26fde9a350 RCX: 00007f26fde261c9
[ 70.585683][ T5077] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
[ 70.593641][ T5077] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 00007ffd89d4d9e8
[ 70.601599][ T5077] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f26fde9a350
[ 70.609558][ T5077] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
[ 70.617536][ T5077]
[ 70.620560][ T5077]
[ 70.622875][ T5077] Allocated by task 5077:
[ 70.627181][ T5077] kasan_save_stack+0x22/0x40
[ 70.631860][ T5077] kasan_set_track+0x25/0x30
[ 70.636463][ T5077] __kasan_slab_alloc+0x7f/0x90
[ 70.641299][ T5077] kmem_cache_alloc_bulk+0x3aa/0x730
[ 70.646573][ T5077] __io_alloc_req_refill+0xcc/0x40b
[ 70.651770][ T5077] io_submit_sqes.cold+0x7c/0xc2
[ 70.656726][ T5077] __do_sys_io_uring_enter+0x9e4/0x2c10
[ 70.662260][ T5077] do_syscall_64+0x39/0xb0
[ 70.666666][ T5077] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 70.672551][ T5077]
[ 70.674859][ T5077] Freed by task 33:
[ 70.678655][ T5077] kasan_save_stack+0x22/0x40
[ 70.683344][ T5077] kasan_set_track+0x25/0x30
[ 70.687923][ T5077] kasan_save_free_info+0x2e/0x40
[ 70.692943][ T5077] ____kasan_slab_free+0x160/0x1c0
[ 70.698063][ T5077] slab_free_freelist_hook+0x8b/0x1c0
[ 70.703417][ T5077] kmem_cache_free+0xec/0x4e0
[ 70.708078][ T5077] io_req_caches_free+0x1a9/0x1e6
[ 70.713089][ T5077] io_ring_exit_work+0x2e7/0xc80
[ 70.718016][ T5077] process_one_work+0x9bf/0x1750
[ 70.722950][ T5077] worker_thread+0x669/0x1090
[ 70.727646][ T5077] kthread+0x2e8/0x3a0
[ 70.731716][ T5077] ret_from_fork+0x1f/0x30
[ 70.736124][ T5077]
[ 70.738442][ T5077] The buggy address belongs to the object at ffff88807abfa8c0
[ 70.738442][ T5077] which belongs to the cache io_kiocb of size 216
[ 70.752234][ T5077] The buggy address is located 136 bytes inside of
[ 70.752234][ T5077] 216-byte region [ffff88807abfa8c0, ffff88807abfa998)
[ 70.765499][ T5077]
[ 70.767825][ T5077] The buggy address belongs to the physical page:
[ 70.774216][ T5077] page:ffffea0001eafe80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7abfa
[ 70.784352][ T5077] flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
[ 70.791885][ T5077] raw: 00fff00000000200 ffff88814633bdc0 dead000000000122 0000000000000000
[ 70.800454][ T5077] raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000
[ 70.809020][ T5077] page dumped because: kasan: bad access detected
[ 70.815424][ T5077] page_owner tracks the page as allocated
[ 70.821119][ T5077] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 5077, tgid 5077 (syz-executor330), ts 70374070428, free_ts 64587215207
[ 70.839794][ T5077] get_page_from_freelist+0x11bb/0x2d50
[ 70.845340][ T5077] __alloc_pages+0x1cb/0x5c0
[ 70.849921][ T5077] alloc_pages+0x1aa/0x270
[ 70.854324][ T5077] allocate_slab+0x25f/0x350
[ 70.858900][ T5077] ___slab_alloc+0xa91/0x1400
[ 70.863578][ T5077] kmem_cache_alloc_bulk+0x23d/0x730
[ 70.868858][ T5077] __io_alloc_req_refill+0xcc/0x40b
[ 70.874056][ T5077] io_submit_sqes.cold+0x7c/0xc2
[ 70.878991][ T5077] __do_sys_io_uring_enter+0x9e4/0x2c10
[ 70.884553][ T5077] do_syscall_64+0x39/0xb0
[ 70.888988][ T5077] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 70.894906][ T5077] page last free stack trace:
[ 70.899566][ T5077] free_pcp_prepare+0x4d0/0x910
[ 70.904408][ T5077] free_unref_page_list+0x176/0xcd0
[ 70.909594][ T5077] release_pages+0xcb1/0x1330
[ 70.914258][ T5077] tlb_batch_pages_flush+0xa8/0x1a0
[ 70.919446][ T5077] tlb_finish_mmu+0x14b/0x7e0
[ 70.924207][ T5077] exit_mmap+0x202/0x7c0
[ 70.928435][ T5077] __mmput+0x128/0x4c0
[ 70.932490][ T5077] mmput+0x60/0x70
[ 70.936198][ T5077] do_exit+0x9ac/0x2a90
[ 70.940351][ T5077] do_group_exit+0xd4/0x2a0
[ 70.944855][ T5077] __x64_sys_exit_group+0x3e/0x50
[ 70.949865][ T5077] do_syscall_64+0x39/0xb0
[ 70.954303][ T5077] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 70.960219][ T5077]
[ 70.962526][ T5077] Memory state around the buggy address:
[ 70.968137][ T5077] ffff88807abfa800: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
[ 70.976183][ T5077] ffff88807abfa880: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[ 70.984238][ T5077] >ffff88807abfa900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 70.992293][ T5077] ^
[ 70.998686][ T5077] ffff88807abfa980: fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 71.006738][ T5077] ffff88807abfaa00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 71.014799][ T5077] ==================================================================
[ 71.028127][ T5077] Kernel panic - not syncing: KASAN: panic_on_warn set ...
[ 71.035339][ T5077] CPU: 0 PID: 5077 Comm: syz-executor330 Not tainted 6.2.0-rc3-next-20230112-syzkaller #0
[ 71.045215][ T5077] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
[ 71.055256][ T5077] Call Trace:
[ 71.058537][ T5077]
[ 71.061470][ T5077] dump_stack_lvl+0xd1/0x138
[ 71.066054][ T5077] panic+0x2cc/0x626
[ 71.069944][ T5077] ? panic_print_sys_info.part.0+0x112/0x112
[ 71.075921][ T5077] ? preempt_schedule_thunk+0x1a/0x20
[ 71.081292][ T5077] ? preempt_schedule_common+0x59/0xc0
[ 71.086772][ T5077] check_panic_on_warn.cold+0x19/0x35
[ 71.092152][ T5077] end_report.part.0+0x36/0x73
[ 71.096932][ T5077] ? io_fallback_tw+0x6d/0x119
[ 71.101687][ T5077] kasan_report.cold+0xa/0xf
[ 71.106270][ T5077] ? io_fallback_tw+0x6d/0x119
[ 71.111060][ T5077] io_fallback_tw+0x6d/0x119
[ 71.115645][ T5077] tctx_task_work.cold+0xf/0x2c
[ 71.120492][ T5077] ? handle_tw_list+0x460/0x460
[ 71.125339][ T5077] ? lock_downgrade+0x6e0/0x6e0
[ 71.130179][ T5077] ? do_raw_spin_lock+0x124/0x2b0
[ 71.135193][ T5077] ? rwlock_bug.part.0+0x90/0x90
[ 71.140127][ T5077] ? _raw_spin_unlock_irq+0x23/0x50
[ 71.145361][ T5077] task_work_run+0x16f/0x270
[ 71.149979][ T5077] ? task_work_cancel+0x30/0x30
[ 71.154847][ T5077] ? do_raw_spin_unlock+0x175/0x230
[ 71.160063][ T5077] do_exit+0xb17/0x2a90
[ 71.164242][ T5077] ? lock_downgrade+0x6e0/0x6e0
[ 71.169107][ T5077] ? do_raw_spin_lock+0x124/0x2b0
[ 71.174145][ T5077] ? mm_update_next_owner+0x7b0/0x7b0
[ 71.179540][ T5077] ? rwlock_bug.part.0+0x90/0x90
[ 71.184495][ T5077] ? _raw_spin_unlock_irq+0x23/0x50
[ 71.189720][ T5077] do_group_exit+0xd4/0x2a0
[ 71.194248][ T5077] __x64_sys_exit_group+0x3e/0x50
[ 71.199277][ T5077] do_syscall_64+0x39/0xb0
[ 71.203700][ T5077] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 71.209622][ T5077] RIP: 0033:0x7f26fde261c9
[ 71.214042][ T5077] Code: Unable to access opcode bytes at 0x7f26fde2619f.
[ 71.221066][ T5077] RSP: 002b:00007ffd89d4d7f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[ 71.229486][ T5077] RAX: ffffffffffffffda RBX: 00007f26fde9a350 RCX: 00007f26fde261c9
[ 71.237464][ T5077] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
[ 71.245440][ T5077] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 00007ffd89d4d9e8
[ 71.253419][ T5077] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f26fde9a350
[ 71.261394][ T5077] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
[ 71.269381][ T5077]
[ 71.272600][ T5077] Kernel Offset: disabled
[ 71.276934][ T5077] Rebooting in 86400 seconds..