Hello, syzbot found the following crash on: HEAD commit: 8ff468c2 Merge branch 'x86-fpu-for-linus' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13e51ef0a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=5d0ca84763a42813 dashboard link: https://syzkaller.appspot.com/bug?extid=89d1ce6e80218a6192d8 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1723cef0a00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+89d1ce6e80218a6192d8@xxxxxxxxxxxxxxxxxxxxxxxxx WARNING: CPU: 0 PID: 7933 at kernel/bpf/core.c:853 bpf_jit_free+0x157/0x1b0 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 7933 Comm: kworker/0:4 Not tainted 5.1.0+ #2Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events bpf_prog_free_deferred Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 panic+0x2cb/0x65c kernel/panic.c:214 BUG: unable to handle page fault for address: fffffbfff4007000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 21ffee067 P4D 21ffee067 PUD 21ffed067 PMD 95fcc067 PTE 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 7933 Comm: kworker/0:4 Not tainted 5.1.0+ #2Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events bpf_prog_free_deferred RIP: 0010:bpf_get_prog_addr_region kernel/bpf/core.c:539 [inline] RIP: 0010:bpf_tree_comp kernel/bpf/core.c:602 [inline] RIP: 0010:__lt_find include/linux/rbtree_latch.h:115 [inline] RIP: 0010:latch_tree_find include/linux/rbtree_latch.h:208 [inline] RIP: 0010:bpf_prog_kallsyms_find kernel/bpf/core.c:676 [inline] RIP: 0010:bpf_prog_kallsyms_find+0x1a0/0x2c0 kernel/bpf/core.c:669Code: 75 07 e8 03 16 f5 ff 0f 0b e8 fc 15 f5 ff 48 89 de 4c 89 f7 e8 11 17 f5 ff 49 39 de 72 71 e8 e7 15 f5 ff 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 74 08 3c 03 0f 8e e6 00 00 00 8b 33 4c 89 f7
RSP: 0018:ffff888098ef7850 EFLAGS: 00010806 RAX: 1ffffffff4007000 RBX: ffffffffa0038000 RCX: ffffffff817b5f0f RDX: 0000000000000000 RSI: ffffffff817b5f19 RDI: 0000000000000006 RBP: ffff888098ef7890 R08: ffff88808fda0040 R09: ffffed1015d06be0 R10: ffffed1015d06bdf R11: ffff8880ae835efb R12: ffff88808f9be878 R13: dffffc0000000000 R14: ffffffffffffffff R15: ffff88808f9be878 FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfff4007000 CR3: 0000000096d4c000 CR4: 00000000001406f0 Call Trace: BUG: unable to handle page fault for address: fffffbfff4007000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 21ffee067 P4D 21ffee067 PUD 21ffed067 PMD 95fcc067 PTE 0 Oops: 0000 [#2] PREEMPT SMP KASAN --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches
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