================================== WARNING: Nested lock was not taken 6.3.0-rc3-syzkaller-00317-g65aca32efdcb #0 Not tainted ---------------------------------- syz-executor.5/27215 is trying to lock: ffffffff8cf25420 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x40 include/linux/rcupdate.h:326 but this task is not holding: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] CPU: 0 PID: 27215 Comm: syz-executor.5 Not tainted 6.3.0-rc3-syzkaller-00317-g65aca32efdcb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:print_lock_nested_lock_not_held kernel/locking/lockdep.c:4888 [inline] RIP: 0010:__lock_acquire+0x10cd/0x1f80 kernel/locking/lockdep.c:5047 Code: 3c 30 00 48 8b 5c 24 78 74 12 48 89 df e8 5b f4 75 00 49 be 00 00 00 00 00 fc ff df 48 8b 1b 48 83 c3 18 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 34 f4 75 00 48 8b 33 48 c7 c7 60 RSP: 0018:ffffc900112c6500 EFLAGS: 00010006 RAX: 0000000000000003 RBX: 0000000000000018 RCX: 1e666058b2514200 RDX: ffffc90005834000 RSI: 000000000000f4c9 RDI: 000000000000f4ca RBP: ffff888017cf8000 R08: ffffffff816dfe9c R09: ffffed101730515b R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888017cf8a30 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888017cf8808 FS: 00007f28a2f8e700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f28a2315889 CR3: 0000000027b98000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1e1/0x520 kernel/locking/lockdep.c:5669 rcu_lock_acquire+0x2e/0x40 include/linux/rcupdate.h:327 rcu_read_lock include/linux/rcupdate.h:773 [inline] filemap_get_read_batch+0x174/0xc90 mm/filemap.c:2377 filemap_get_pages+0x4b9/0x20c0 mm/filemap.c:2600 filemap_read+0x45a/0x1170 mm/filemap.c:2693 __kernel_read+0x422/0x8a0 fs/read_write.c:428 integrity_kernel_read+0xb0/0xf0 security/integrity/iint.c:199 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:485 [inline] ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline] ima_calc_file_hash+0xa5b/0x1c00 security/integrity/ima/ima_crypto.c:573 ima_collect_measurement+0x3a7/0x880 security/integrity/ima/ima_api.c:293 process_measurement+0xfdb/0x1ce0 security/integrity/ima/ima_main.c:341 ima_file_check+0xf1/0x170 security/integrity/ima/ima_main.c:539 do_open fs/namei.c:3562 [inline] path_openat+0x280a/0x3170 fs/namei.c:3715 do_filp_open+0x234/0x490 fs/namei.c:3742 do_sys_openat2+0x13f/0x500 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_open fs/open.c:1372 [inline] __se_sys_open fs/open.c:1368 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1368 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f28a228c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f28a2f8e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f28a23ac050 RCX: 00007f28a228c0f9 RDX: 00000000000000f8 RSI: 0000000000000280 RDI: 0000000020000140 RBP: 00007f28a22e7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd2394c9df R14: 00007f28a2f8e300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:print_lock_nested_lock_not_held kernel/locking/lockdep.c:4888 [inline] RIP: 0010:__lock_acquire+0x10cd/0x1f80 kernel/locking/lockdep.c:5047 Code: 3c 30 00 48 8b 5c 24 78 74 12 48 89 df e8 5b f4 75 00 49 be 00 00 00 00 00 fc ff df 48 8b 1b 48 83 c3 18 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 34 f4 75 00 48 8b 33 48 c7 c7 60 RSP: 0018:ffffc900112c6500 EFLAGS: 00010006 RAX: 0000000000000003 RBX: 0000000000000018 RCX: 1e666058b2514200 RDX: ffffc90005834000 RSI: 000000000000f4c9 RDI: 000000000000f4ca RBP: ffff888017cf8000 R08: ffffffff816dfe9c R09: ffffed101730515b R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888017cf8a30 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888017cf8808 FS: 00007f28a2f8e700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f28a2315889 CR3: 0000000027b98000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 3c 30 cmp $0x30,%al 2: 00 48 8b add %cl,-0x75(%rax) 5: 5c pop %rsp 6: 24 78 and $0x78,%al 8: 74 12 je 0x1c a: 48 89 df mov %rbx,%rdi d: e8 5b f4 75 00 callq 0x75f46d 12: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14 19: fc ff df 1c: 48 8b 1b mov (%rbx),%rbx 1f: 48 83 c3 18 add $0x18,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 34 f4 75 00 callq 0x75f46d 39: 48 8b 33 mov (%rbx),%rsi 3c: 48 rex.W 3d: c7 .byte 0xc7 3e: c7 (bad) 3f: 60 (bad)