Hello, syzbot found the following issue on: HEAD commit: eb5f95f1 Merge tag 's390-5.9-6' of git://git.kernel.org/pu.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14720ac3900000 kernel config: https://syzkaller.appspot.com/x/.config?x=cd992d74d6c7e62 dashboard link: https://syzkaller.appspot.com/bug?extid=1dccfcb049726389379c compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1dccfcb049726389379c@xxxxxxxxxxxxxxxxxxxxxxxxx general protection fault, probably for non-canonical address 0x1ffffffef40f602c: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 3915 Comm: systemd-udevd Not tainted 5.9.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:update_pvclock_gtod arch/x86/kvm/x86.c:1743 [inline] RIP: 0010:pvclock_gtod_notify+0x11d/0x490 arch/x86/kvm/x86.c:7452 Code: 10 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 69 76 a7 00 49 8b 47 10 48 89 05 f6 08 cb 09 49 8d 7f 08 48 89 f8 48 c1 e8 03 <42> 80 3c 70 07 77 00 e8 47 76 a7 00 49 8b 47 08 48 89 05 dc 08 cb RSP: 0018:ffffc90000da8c50 EFLAGS: 00010806 RAX: 1ffffffff1707d7e RBX: ffffffff894cc67c RCX: ffffffff815adc44 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff8b83ebf0 RBP: ffffffff894bd1a8 R08: dffffc0000000000 R09: fffffbfff167daa0 R10: fffffbfff167daa0 R11: 0000000000000000 R12: dffffc0000000000 R13: 00000000ffffffff R14: ffffffff814f7157 R15: ffffffff8b83ebe8 FS: 00007f7a9e2c88c0(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000744138 CR3: 00000000a256d000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> notifier_call_chain kernel/notifier.c:83 [inline] __raw_notifier_call_chain kernel/notifier.c:361 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:368 update_pvclock_gtod kernel/time/timekeeping.c:581 [inline] timekeeping_update+0x281/0x3f0 kernel/time/timekeeping.c:675 timekeeping_advance+0x830/0xa00 kernel/time/timekeeping.c:2122 tick_sched_do_timer kernel/time/tick-sched.c:147 [inline] tick_sched_timer+0xba/0x410 kernel/time/tick-sched.c:1321 __run_hrtimer kernel/time/hrtimer.c:1524 [inline] __hrtimer_run_queues+0x42d/0x930 kernel/time/hrtimer.c:1588 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1650 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0xf0/0x260 arch/x86/kernel/apic/apic.c:1097 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 </IRQ> __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] sysvec_apic_timer_interrupt+0x94/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:___might_sleep+0x60/0x570 kernel/sched/core.c:7265 Code: ff ff e8 e3 d2 d9 06 85 c0 74 1f c6 05 49 10 39 08 01 48 c7 c7 2a 87 09 89 be 61 1c 00 00 48 c7 c2 11 89 09 89 e8 90 a4 08 00 <e8> 4b d5 d9 06 85 c0 74 3d 80 3d 22 10 39 08 00 75 34 48 c7 c7 20 RSP: 0018:ffffc900011f7b08 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000c40 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff894fe578 RDI: 0000000000000282 RBP: ffff8880aa440900 R08: dffffc0000000000 R09: fffffbfff167da9f R10: fffffbfff167da9f R11: 0000000000000000 R12: 0000000000001000 R13: 0000000000000c40 R14: 0000000000000000 R15: 0000000000000000 cache_alloc_debugcheck_before mm/slab.c:2984 [inline] slab_alloc mm/slab.c:3302 [inline] __do_kmalloc mm/slab.c:3653 [inline] __kmalloc+0x94/0x300 mm/slab.c:3664 kmalloc include/linux/slab.h:559 [inline] tomoyo_realpath_from_path+0xd8/0x630 security/tomoyo/realpath.c:254 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x17d/0x740 security/tomoyo/file.c:822 security_inode_getattr+0xc0/0x140 security/security.c:1278 vfs_getattr fs/stat.c:121 [inline] vfs_statx+0x118/0x380 fs/stat.c:206 vfs_lstat include/linux/fs.h:3178 [inline] __do_sys_newlstat fs/stat.c:374 [inline] __se_sys_newlstat fs/stat.c:368 [inline] __x64_sys_newlstat+0x81/0xd0 fs/stat.c:368 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f7a9d13b335 Code: 69 db 2b 00 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 83 ff 01 48 89 f0 77 30 48 89 c7 48 89 d6 b8 06 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 03 f3 c3 90 48 8b 15 31 db 2b 00 f7 d8 64 89 RSP: 002b:00007fff5eaa2608 EFLAGS: 00000246 ORIG_RAX: 0000000000000006 RAX: ffffffffffffffda RBX: 0000564636a00770 RCX: 00007f7a9d13b335 RDX: 00007fff5eaa2640 RSI: 00007fff5eaa2640 RDI: 00005646369ff770 RBP: 00007fff5eaa2700 R08: 00007f7a9d3fa178 R09: 0000000000001010 R10: 0000000000000020 R11: 0000000000000246 R12: 00005646369ff770 R13: 00005646369ff790 R14: 00005646369a42bb R15: 00005646369a42c0 Modules linked in: ---[ end trace 4ff96b4858c23e64 ]--- RIP: 0010:update_pvclock_gtod arch/x86/kvm/x86.c:1743 [inline] RIP: 0010:pvclock_gtod_notify+0x11d/0x490 arch/x86/kvm/x86.c:7452 Code: 10 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 69 76 a7 00 49 8b 47 10 48 89 05 f6 08 cb 09 49 8d 7f 08 48 89 f8 48 c1 e8 03 <42> 80 3c 70 07 77 00 e8 47 76 a7 00 49 8b 47 08 48 89 05 dc 08 cb RSP: 0018:ffffc90000da8c50 EFLAGS: 00010806 RAX: 1ffffffff1707d7e RBX: ffffffff894cc67c RCX: ffffffff815adc44 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff8b83ebf0 RBP: ffffffff894bd1a8 R08: dffffc0000000000 R09: fffffbfff167daa0 R10: fffffbfff167daa0 R11: 0000000000000000 R12: dffffc0000000000 R13: 00000000ffffffff R14: ffffffff814f7157 R15: ffffffff8b83ebe8 FS: 00007f7a9e2c88c0(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000744138 CR3: 00000000a256d000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report is generated by a bot. 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