RBP: 00007ffd71596a20 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffd71597a90 R13: 0000555591b516c0 R14: 00007ffd71597a90 R15: 0000000000000001 </TASK> ---[ end trace 0000000000000000 ]--- ================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:102 [inline] BUG: KASAN: null-ptr-deref in atomic_inc_return include/linux/atomic/atomic-instrumented.h:198 [inline] BUG: KASAN: null-ptr-deref in ihold+0x20/0x60 fs/inode.c:452 Write of size 4 at addr 0000000000000170 by task syz-executor362/297 CPU: 1 PID: 297 Comm: syz-executor362 Tainted: G W 6.1.115-syzkaller-00017-g22b7ded8b55b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_report+0xe1/0x4e0 mm/kasan/report.c:430 kasan_report+0x13c/0x170 mm/kasan/report.c:531 kasan_check_range+0x294/0x2a0 mm/kasan/generic.c:189 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:102 [inline] atomic_inc_return include/linux/atomic/atomic-instrumented.h:198 [inline] ihold+0x20/0x60 fs/inode.c:452 d_delete_notify include/linux/fsnotify.h:289 [inline] vfs_rmdir+0x268/0x500 fs/namei.c:4203 incfs_kill_sb+0x113/0x230 fs/incfs/vfs.c:1995 deactivate_locked_super+0xad/0x110 fs/super.c:334 deactivate_super+0xbe/0xf0 fs/super.c:365 cleanup_mnt+0x485/0x510 fs/namespace.c:1186 __cleanup_mnt+0x19/0x20 fs/namespace.c:1193 task_work_run+0x24d/0x2e0 kernel/task_work.c:203 ptrace_notify+0x29e/0x350 kernel/signal.c:2376 ptrace_report_syscall include/linux/ptrace.h:420 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:482 [inline] syscall_exit_work kernel/entry/common.c:258 [inline] syscall_exit_to_user_mode_prepare kernel/entry/common.c:285 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x99/0x130 kernel/entry/common.c:303 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fd0eef4aa47 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffd71596968 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd0eef4aa47 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd71596a20 RBP: 00007ffd71596a20 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffd71597a90 R13: 0000555591b516c0 R14: 00007ffd71597a90 R15: 0000000000000001 </TASK> ================================================================== BUG: kernel NULL pointer dereference, address: 0000000000000170 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 0 P4D 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 1 PID: 297 Comm: syz-executor362 Tainted: G B W 6.1.115-syzkaller-00017-g22b7ded8b55b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:arch_atomic_inc_return include/linux/atomic/atomic-arch-fallback.h:440 [inline] RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:199 [inline] RIP: 0010:ihold+0x25/0x60 fs/inode.c:452 Code: 00 00 00 00 00 55 48 89 e5 41 56 53 49 89 fe e8 01 66 a8 ff 49 8d be 70 01 00 00 be 04 00 00 00 e8 10 da ef ff bb 01 00 00 00 <f0> 41 0f c1 9e 70 01 00 00 ff c3 bf 02 00 00 00 89 de e8 84 69 a8 RSP: 0018:ffffc90000ad7b70 EFLAGS: 00010246 RAX: ffff888110285100 RBX: 0000000000000001 RCX: ffff888110285100 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000ad7b80 R08: ffffffff8144a503 R09: fffffbfff0f6e2fd R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff110239ab4ce R13: ffff888123204aa0 R14: 0000000000000000 R15: 1ffff1102464095a FS: 0000555591b50380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000170 CR3: 0000000124c3a000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> d_delete_notify include/linux/fsnotify.h:289 [inline] vfs_rmdir+0x268/0x500 fs/namei.c:4203 incfs_kill_sb+0x113/0x230 fs/incfs/vfs.c:1995 deactivate_locked_super+0xad/0x110 fs/super.c:334 deactivate_super+0xbe/0xf0 fs/super.c:365 cleanup_mnt+0x485/0x510 fs/namespace.c:1186 __cleanup_mnt+0x19/0x20 fs/namespace.c:1193 task_work_run+0x24d/0x2e0 kernel/task_work.c:203 ptrace_notify+0x29e/0x350 kernel/signal.c:2376 ptrace_report_syscall include/linux/ptrace.h:420 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:482 [inline] syscall_exit_work kernel/entry/common.c:258 [inline] syscall_exit_to_user_mode_prepare kernel/entry/common.c:285 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x99/0x130 kernel/entry/common.c:303 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fd0eef4aa47 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffd71596968 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd0eef4aa47 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd71596a20 RBP: 00007ffd71596a20 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffd71597a90 R13: 0000555591b516c0 R14: 00007ffd71597a90 R15: 0000000000000001 </TASK> Modules linked in: CR2: 0000000000000170 ---[ end trace 0000000000000000 ]--- RIP: 0010:arch_atomic_inc_return include/linux/atomic/atomic-arch-fallback.h:440 [inline] RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:199 [inline] RIP: 0010:ihold+0x25/0x60 fs/inode.c:452 Code: 00 00 00 00 00 55 48 89 e5 41 56 53 49 89 fe e8 01 66 a8 ff 49 8d be 70 01 00 00 be 04 00 00 00 e8 10 da ef ff bb 01 00 00 00 <f0> 41 0f c1 9e 70 01 00 00 ff c3 bf 02 00 00 00 89 de e8 84 69 a8 RSP: 0018:ffffc90000ad7b70 EFLAGS: 00010246 RAX: ffff888110285100 RBX: 0000000000000001 RCX: ffff888110285100 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000ad7b80 R08: ffffffff8144a503 R09: fffffbfff0f6e2fd R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff110239ab4ce R13: ffff888123204aa0 R14: 0000000000000000 R15: 1ffff1102464095a FS: 0000555591b50380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000170 CR3: 0000000124c3a000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: 00 55 48 add %dl,0x48(%rbp) 7: 89 e5 mov %esp,%ebp 9: 41 56 push %r14 b: 53 push %rbx c: 49 89 fe mov %rdi,%r14 f: e8 01 66 a8 ff call 0xffa86615 14: 49 8d be 70 01 00 00 lea 0x170(%r14),%rdi 1b: be 04 00 00 00 mov $0x4,%esi 20: e8 10 da ef ff call 0xffefda35 25: bb 01 00 00 00 mov $0x1,%ebx * 2a: f0 41 0f c1 9e 70 01 lock xadd %ebx,0x170(%r14) <-- trapping instruction 31: 00 00 33: ff c3 inc %ebx 35: bf 02 00 00 00 mov $0x2,%edi 3a: 89 de mov %ebx,%esi 3c: e8 .byte 0xe8 3d: 84 69 a8 test %ch,-0x58(%rcx)