ISOFS: Unable to identify CD-ROM format. BUG: unable to handle page fault for address: ffffffffff4c7f14 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 4c29067 P4D 4c29067 PUD 4c2b067 PMD 4c2c067 PTE 0 Oops: 0000 [#1] SMP KASAN NOPTI CPU: 0 PID: 446 Comm: syz-executor.3 Not tainted 5.10.45 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 ISOFS: Unable to identify CD-ROM format. RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:29 [inline] RIP: 0010:atomic_read include/asm-generic/atomic-instrumented.h:28 [inline] RIP: 0010:dqput.part.0+0xc0/0x7b0 fs/quota/dquot.c:770 Code: c7 c7 00 48 c1 84 e8 ef a2 38 02 be 04 00 00 00 4c 89 ef e8 52 1d de ff 41 0f b6 07 38 44 24 07 7c 08 84 c0 0f 85 85 05 00 00 <44> 8b b3 10 01 00 00 bf 01 00 00 00 44 89 f6 e8 7c 1d b3 ff 41 83 RSP: 0018:ffff88804337fa98 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffffffff4c7e04 RCX: ffffffff818c678e RDX: fffffbffffe98fe3 RSI: 0000000000000004 RDI: ffffffffff4c7f14 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffffff4c7f17 R10: fffffbffffe98fe2 R11: 0000000000000001 R12: ffffffffff4c7f34 R13: ffffffffff4c7f14 R14: 0000000000000004 R15: fffffbffffe98fe2 FS: 000000000179c400(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff4c7f14 CR3: 0000000043366000 CR4: 0000000000350ef0 Call Trace: dqput fs/quota/dquot.c:757 [inline] dqput_all fs/quota/dquot.c:397 [inline] __dquot_drop+0x1a2/0x270 fs/quota/dquot.c:1577 dquot_drop fs/quota/dquot.c:1602 [inline] dquot_drop+0x151/0x1a0 fs/quota/dquot.c:1580 ext4_clear_inode+0x52/0x1e0 fs/ext4/super.c:1404 ext4_evict_inode+0x1cb/0x1a40 fs/ext4/inode.c:341 evict+0x284/0x6b0 fs/inode.c:578 dispose_list+0xd7/0x190 fs/inode.c:613 evict_inodes+0x321/0x420 fs/inode.c:663 generic_shutdown_super+0xa6/0x370 fs/super.c:454 kill_block_super+0x9d/0xf0 fs/super.c:1446 deactivate_locked_super+0x99/0x160 fs/super.c:335 deactivate_super+0xad/0xd0 fs/super.c:366 cleanup_mnt+0x396/0x500 fs/namespace.c:1118 task_work_run+0xe2/0x1a0 kernel/task_work.c:151 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0x155/0x160 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x38/0x230 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x467a67 Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc97b9c1b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000258 RCX: 0000000000467a67 RDX: 00007ffc97b9c28b RSI: 0000000000000002 RDI: 00007ffc97b9c280 RBP: 00007ffc97b9c280 R08: 00000000ffffffff R09: 00007ffc97b9c050 R10: 000000000179db43 R11: 0000000000000246 R12: 00000000004bee70 R13: 00007ffc97b9d350 R14: 000000000179db00 R15: 00007ffc97b9d390 Modules linked in: CR2: ffffffffff4c7f14 ---[ end trace 65da76b6e669d0ff ]--- RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:29 [inline] RIP: 0010:atomic_read include/asm-generic/atomic-instrumented.h:28 [inline] RIP: 0010:dqput.part.0+0xc0/0x7b0 fs/quota/dquot.c:770 Code: c7 c7 00 48 c1 84 e8 ef a2 38 02 be 04 00 00 00 4c 89 ef e8 52 1d de ff 41 0f b6 07 38 44 24 07 7c 08 84 c0 0f 85 85 05 00 00 <44> 8b b3 10 01 00 00 bf 01 00 00 00 44 89 f6 e8 7c 1d b3 ff 41 83 RSP: 0018:ffff88804337fa98 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffffffff4c7e04 RCX: ffffffff818c678e RDX: fffffbffffe98fe3 RSI: 0000000000000004 RDI: ffffffffff4c7f14 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffffff4c7f17 R10: fffffbffffe98fe2 R11: 0000000000000001 R12: ffffffffff4c7f34 R13: ffffffffff4c7f14 R14: 0000000000000004 R15: fffffbffffe98fe2 FS: 000000000179c400(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff4c7f14 CR3: 0000000043366000 CR4: 0000000000350ef0 note: syz-executor.3[446] exited with preempt_count 1 BUG: sleeping function called from invalid context at include/linux/percpu-rwsem.h:49 in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 446, name: syz-executor.3 INFO: lockdep is turned off. irq event stamp: 1269032 hardirqs last enabled at (1269031): [<ffffffff83c50d8f>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (1269031): [<ffffffff83c50d8f>] _raw_spin_unlock_irq+0x1f/0x30 kernel/locking/spinlock.c:199 hardirqs last disabled at (1269032): [<ffffffff83c37925>] exc_page_fault+0x45/0x1a0 arch/x86/mm/fault.c:1489 softirqs last enabled at (1268966): [<ffffffff817a8a9a>] bdi_split_work_to_wbs fs/fs-writeback.c:1061 [inline] softirqs last enabled at (1268966): [<ffffffff817a8a9a>] sync_inodes_sb+0x1aa/0x940 fs/fs-writeback.c:2560 softirqs last disabled at (1268962): [<ffffffff817a36f7>] spin_lock_bh include/linux/spinlock.h:359 [inline] softirqs last disabled at (1268962): [<ffffffff817a36f7>] wb_queue_work+0xc7/0x3c0 fs/fs-writeback.c:185 CPU: 0 PID: 446 Comm: syz-executor.3 Tainted: G D 5.10.45 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:118 ___might_sleep.cold+0x141/0x16f kernel/sched/core.c:7297 percpu_down_read include/linux/percpu-rwsem.h:49 [inline] cgroup_threadgroup_change_begin include/linux/cgroup-defs.h:733 [inline] exit_signals+0x23/0x840 kernel/signal.c:2843 do_exit+0x30a/0x2780 kernel/exit.c:767 rewind_stack_do_exit+0x17/0x20 arch/x86/entry/entry_64.S:1483 RIP: 0033:0x467a67 Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc97b9c1b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000258 RCX: 0000000000467a67 RDX: 00007ffc97b9c28b RSI: 0000000000000002 RDI: 00007ffc97b9c280 RBP: 00007ffc97b9c280 R08: 00000000ffffffff R09: 00007ffc97b9c050 R10: 000000000179db43 R11: 0000000000000246 R12: 00000000004bee70 R13: 00007ffc97b9d350 R14: 000000000179db00 R15: 00007ffc97b9d390 kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak)