general protection fault, probably for non-canonical address 0xf2c260001e2c004d: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0x96132000f1600268-0x96132000f160026f] CPU: 0 PID: 10648 Comm: syz-executor.5 Not tainted 5.9.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:htab_elem_free kernel/bpf/hashtab.c:769 [inline] RIP: 0010:htab_elem_free_rcu+0x4a/0x110 kernel/bpf/hashtab.c:779 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bc 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b f8 48 8d 7d 18 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 82 00 00 00 44 8b 65 18 bf 05 RSP: 0018:ffffc90000007e48 EFLAGS: 00010a07 RAX: dffffc0000000000 RBX: ffff888051400010 RCX: 0000000000000001 RDX: 12c264001e2c004d RSI: ffffffff81893b0e RDI: 96132000f160026c RBP: 96132000f1600254 R08: 0000000000000000 R09: ffffffff8ce2b9ff R10: fffffbfff19c573f R11: 0000000000000000 R12: ffffc90000007ed0 R13: ffff888051400000 R14: 0000000000000000 R15: ffff88805e74a3c0 FS: 00007f66925ef700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020200000 CR3: 000000009b130000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_do_batch kernel/rcu/tree.c:2428 [inline] rcu_core+0x5ca/0x1130 kernel/rcu/tree.c:2656 __do_softirq+0x1f8/0xb23 kernel/softirq.c:298 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __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] do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x235/0x280 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:__orc_find+0x97/0xf0 arch/x86/kernel/unwind_orc.c:58 Code: 14 38 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 48 48 63 03 48 01 d8 48 39 c1 73 b0 4c 8d 63 fc 49 39 ec 73 b3 4d 29 ee <49> c1 fe 02 4b 8d 04 76 48 8d 04 46 48 83 c4 10 5b 5d 41 5c 41 5d RSP: 0018:ffffc90005767298 EFLAGS: 00000246 RAX: ffffffff8204487e RBX: ffffffff8b4cba0c RCX: ffffffff82044a4f RDX: 0000000000000000 RSI: ffffffff8baf597e RDI: ffffffff8b4cba0c RBP: ffffffff8b4cba10 R08: ffffffff8baf59b4 R09: ffffffff8baf597e R10: 000000000007401f R11: 0000000000039a05 R12: ffffffff8b4cba0c R13: ffffffff8b4cba0c R14: 0000000000000000 R15: dffffc0000000000 orc_find arch/x86/kernel/unwind_orc.c:172 [inline] unwind_next_frame+0x342/0x1f90 arch/x86/kernel/unwind_orc.c:449 arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461 slab_post_alloc_hook mm/slab.h:518 [inline] slab_alloc mm/slab.c:3312 [inline] kmem_cache_alloc+0x13a/0x3f0 mm/slab.c:3482 kmem_cache_zalloc include/linux/slab.h:656 [inline] alloc_buffer_head+0x20/0x140 fs/buffer.c:3352 alloc_page_buffers+0x167/0x590 fs/buffer.c:856 create_empty_buffers+0x2c/0x820 fs/buffer.c:1561 ext4_block_write_begin+0x10dd/0x1490 fs/ext4/inode.c:1041 ext4_da_write_begin+0x3e4/0x11d0 fs/ext4/inode.c:2996 generic_perform_write+0x20a/0x4f0 mm/filemap.c:3403 ext4_buffered_write_iter+0x235/0x4a0 fs/ext4/file.c:269 ext4_file_write_iter+0x1f0/0x13f0 fs/ext4/file.c:660 call_write_iter include/linux/fs.h:1882 [inline] new_sync_write+0x422/0x650 fs/read_write.c:503 vfs_write+0x5ad/0x730 fs/read_write.c:578 ksys_write+0x12d/0x250 fs/read_write.c:631 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5f9 Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f66925eec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000038e00 RCX: 000000000045d5f9 RDX: 0000000000400086 RSI: 0000000020000200 RDI: 0000000000000004 RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffcbbccbaef R14: 00007f66925ef9c0 R15: 000000000118cf4c Modules linked in: ---[ end trace f6d2e4d3c2202b29 ]--- RIP: 0010:htab_elem_free kernel/bpf/hashtab.c:769 [inline] RIP: 0010:htab_elem_free_rcu+0x4a/0x110 kernel/bpf/hashtab.c:779 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bc 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b f8 48 8d 7d 18 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 82 00 00 00 44 8b 65 18 bf 05 RSP: 0018:ffffc90000007e48 EFLAGS: 00010a07 RAX: dffffc0000000000 RBX: ffff888051400010 RCX: 0000000000000001 RDX: 12c264001e2c004d RSI: ffffffff81893b0e RDI: 96132000f160026c RBP: 96132000f1600254 R08: 0000000000000000 R09: ffffffff8ce2b9ff R10: fffffbfff19c573f R11: 0000000000000000 R12: ffffc90000007ed0 R13: ffff888051400000 R14: 0000000000000000 R15: ffff88805e74a3c0 FS: 00007f66925ef700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020200000 CR3: 000000009b130000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400