general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] CPU: 1 PID: 2197 Comm: syz-executor.3 Not tainted 5.14.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:dst_dev_put+0x1f/0x2a0 net/core/dst.c:156 Code: 1f 84 00 00 00 00 00 0f 1f 40 00 41 55 41 54 55 53 48 89 fb e8 32 0f 5a fa 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 61 02 00 00 48 8d 7b 3a 4c 8b 23 48 b8 00 00 00 RSP: 0018:ffffc90000dc0d50 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 000000000000001b RCX: 0000000000000100 RDX: 0000000000000003 RSI: ffffffff871b7a7e RDI: 000000000000001b RBP: 0000000000000000 R08: 0000000000000000 R09: ffff888071e8056b R10: ffffffff87add440 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000607f46056ce8 R14: ffffffff8d6c1be4 R15: 000000000000001b FS: 0000000001798400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004e4da3 CR3: 0000000054a2c000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rt_fibinfo_free_cpus.part.0+0xf5/0x180 net/ipv4/fib_semantics.c:202 rt_fibinfo_free_cpus net/ipv4/fib_semantics.c:194 [inline] fib_nh_common_release+0x10c/0x330 net/ipv4/fib_semantics.c:215 fib_nh_release net/ipv4/fib_semantics.c:227 [inline] free_fib_info_rcu+0x24b/0x4e0 net/ipv4/fib_semantics.c:239 rcu_do_batch kernel/rcu/tree.c:2550 [inline] rcu_core+0x7ab/0x1380 kernel/rcu/tree.c:2785 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__find_get_block+0x229/0xdb0 fs/buffer.c:1306 Code: 5d bf 9d ff 49 8d 7f 60 be 04 00 00 00 e8 5f 3d e4 ff f0 41 ff 47 60 eb 03 45 31 ed e8 40 bf 9d ff e8 5b e2 a3 ff fb 4d 85 ed <0f> 84 b2 01 00 00 e8 2c bf 9d ff 0f 1f 44 00 00 e8 22 bf 9d ff e8 RSP: 0018:ffffc90001e0fa60 EFLAGS: 00000246 RAX: 0000000000000ac5 RBX: 0000000000000010 RCX: 1ffffffff1fa310a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000000000f R08: 0000000000000001 R09: ffffffff8fcde93f R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000386 R13: 0000000000000000 R14: 00000000000003b7 R15: ffff88806a8e41d0 sb_find_get_block include/linux/buffer_head.h:340 [inline] recently_deleted fs/ext4/ialloc.c:687 [inline] find_inode_bit+0x230/0x580 fs/ext4/ialloc.c:729 __ext4_new_inode+0xc4d/0x5c40 fs/ext4/ialloc.c:1064 ext4_symlink+0x489/0xd50 fs/ext4/namei.c:3465 vfs_symlink fs/namei.c:4182 [inline] vfs_symlink+0x473/0x6a0 fs/namei.c:4167 do_symlinkat+0x27a/0x300 fs/namei.c:4212 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef7 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 58 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:00007ffd0a22b238 EFLAGS: 00000202 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000465ef7 RDX: 00007ffd0a22b323 RSI: 00000000004bfd6e RDI: 00007ffd0a22b310 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd0a22b0d0 R10: 00007ffd0a22af87 R11: 0000000000000202 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd0a22b310 Modules linked in: ---[ end trace 80164c58de1ab089 ]--- RIP: 0010:dst_dev_put+0x1f/0x2a0 net/core/dst.c:156 Code: 1f 84 00 00 00 00 00 0f 1f 40 00 41 55 41 54 55 53 48 89 fb e8 32 0f 5a fa 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 61 02 00 00 48 8d 7b 3a 4c 8b 23 48 b8 00 00 00 RSP: 0018:ffffc90000dc0d50 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 000000000000001b RCX: 0000000000000100 RDX: 0000000000000003 RSI: ffffffff871b7a7e RDI: 000000000000001b RBP: 0000000000000000 R08: 0000000000000000 R09: ffff888071e8056b R10: ffffffff87add440 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000607f46056ce8 R14: ffffffff8d6c1be4 R15: 000000000000001b FS: 0000000001798400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004e4da3 CR3: 0000000054a2c000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400