Oops: general protection fault, probably for non-canonical address 0xe003fbfffff80000: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: maybe wild-memory-access in range [0x001fffffffc00000-0x001fffffffc00007] CPU: 0 PID: 8031 Comm: syz-executor.0 Not tainted 6.10.0-rc2-syzkaller-00010-g2ab795141095 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:get_work_pool+0xcb/0x1c0 kernel/workqueue.c:887 Code: 0d 36 00 48 89 d8 5b 5d c3 cc cc cc cc e8 8d 0d 36 00 48 81 e3 00 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 da 00 00 00 48 8b 1b e8 63 0d 36 00 48 89 d8 5b RSP: 0000:ffffc90003f07ac0 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 001fffffffc00000 RCX: ffffffff81587192 RDX: 0003fffffff80000 RSI: ffffffff815871e3 RDI: 0000000000000007 RBP: 0000000000000004 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000000 R12: ffff8880732042c0 R13: 0000000000000001 R14: ffffe8ffad29acf8 R15: ffffed100e640859 FS: 0000000000000000(0000) GS:ffff88802c000000(0063) knlGS:0000000056e50400 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000030f2f000 CR3: 0000000062fc8000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: start_flush_work kernel/workqueue.c:4123 [inline] __flush_work+0x12f/0xc60 kernel/workqueue.c:4181 cleanup_srcu_struct+0x130/0x520 kernel/rcu/srcutree.c:660 bch2_fs_btree_iter_exit+0x46e/0x630 fs/bcachefs/btree_iter.c:3410 __bch2_fs_free fs/bcachefs/super.c:556 [inline] bch2_fs_release+0x117/0x820 fs/bcachefs/super.c:603 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1fa/0x5b0 lib/kobject.c:737 deactivate_locked_super+0xbe/0x1a0 fs/super.c:473 deactivate_super+0xde/0x100 fs/super.c:506 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218 __do_fast_syscall_32+0x80/0x120 arch/x86/entry/common.c:389 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf730e579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000ffde31a8 EFLAGS: 00000292 ORIG_RAX: 0000000000000034 RAX: 0000000000000000 RBX: 00000000ffde3250 RCX: 0000000000000009 RDX: 00000000f7464ff4 RSI: 00000000f73b5361 RDI: 00000000ffde42f4 RBP: 00000000ffde3250 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:get_work_pool+0xcb/0x1c0 kernel/workqueue.c:887 Code: 0d 36 00 48 89 d8 5b 5d c3 cc cc cc cc e8 8d 0d 36 00 48 81 e3 00 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 da 00 00 00 48 8b 1b e8 63 0d 36 00 48 89 d8 5b RSP: 0000:ffffc90003f07ac0 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 001fffffffc00000 RCX: ffffffff81587192 RDX: 0003fffffff80000 RSI: ffffffff815871e3 RDI: 0000000000000007 RBP: 0000000000000004 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000000 R12: ffff8880732042c0 R13: 0000000000000001 R14: ffffe8ffad29acf8 R15: ffffed100e640859 FS: 0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:0000000056e50400 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000ee9ea000 CR3: 0000000062fc8000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 0d 36 00 48 89 or $0x89480036,%eax 5: d8 5b 5d fcomps 0x5d(%rbx) 8: c3 ret 9: cc int3 a: cc int3 b: cc int3 c: cc int3 d: e8 8d 0d 36 00 call 0x360d9f 12: 48 81 e3 00 fe ff ff and $0xfffffffffffffe00,%rbx 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 da mov %rbx,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 da 00 00 00 jne 0x10e 34: 48 8b 1b mov (%rbx),%rbx 37: e8 63 0d 36 00 call 0x360d9f 3c: 48 89 d8 mov %rbx,%rax 3f: 5b pop %rbx