R10: 00007fff116fa400 R11: 0000000000000202 R12: 0000558e581645e0 R13: 0000558e666f6d40 R14: 0000000000000000 R15: 00007fff116fa1b0 Kernel panic - not syncing: kernel: panic_on_warn set ... CPU: 0 UID: 101 PID: 5499 Comm: dhcpcd Tainted: G Y syzkaller #0 PREEMPT(full) Tainted: [Y]=FORCED_BIND Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 vpanic+0x2dc/0x6f8 kernel/panic.c:661 panic+0xd1/0xe0 kernel/panic.c:787 check_panic_on_warn kernel/panic.c:533 [inline] check_panic_on_warn.cold+0x19/0x34 kernel/panic.c:528 __warn.cold+0x191/0x321 kernel/panic.c:1105 __report_bug+0x30f/0x440 lib/bug.c:254 report_bug+0xb3/0x220 lib/bug.c:286 handle_bug+0x16a/0x2a0 arch/x86/kernel/traps.c:436 exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:490 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:593 RIP: 0010:__alloc_pages_slowpath mm/page_alloc.c:4800 [inline] RIP: 0010:__alloc_frozen_pages_noprof+0x1d63/0x3280 mm/page_alloc.c:5457 Code: 38 d0 7c 08 84 d2 0f 85 ae 12 00 00 65 48 8b 05 6b 71 40 13 c7 84 24 94 00 00 00 00 80 00 00 f6 40 2d 08 0f 84 6b e7 ff ff 90 <0f> 0b 90 e9 62 e7 ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 RSP: 0000:ffffc900035d6168 EFLAGS: 00010202 RAX: ffff8880009b2580 RBX: 0000000000000000 RCX: 1ffff1100fffad69 RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88803fffd938 RBP: 0000000000008000 R08: 0000000000000001 R09: 000000000000308a R10: 0000000000000000 R11: 0000000000048c40 R12: ffff8880009b25ac R13: 0000000000000000 R14: 0000000000000000 R15: 1ffff920006bac47 alloc_pages_mpol+0x201/0x560 mm/mempolicy.c:2511 alloc_pages_noprof mm/mempolicy.c:2602 [inline] folio_alloc_noprof+0x22/0x250 mm/mempolicy.c:2612 filemap_alloc_folio_noprof.part.0+0x3db/0x440 mm/filemap.c:1018 filemap_alloc_folio_noprof mm/filemap.c:2051 [inline] __filemap_get_folio_mpol+0x64e/0x1230 mm/filemap.c:2036 __filemap_get_folio include/linux/pagemap.h:758 [inline] ext4_mb_load_buddy_gfp+0x708/0x1b20 fs/ext4/mballoc.c:1730 ext4_discard_preallocations+0x584/0x10c0 fs/ext4/mballoc.c:5684 ext4_clear_inode+0x6e/0x280 fs/ext4/super.c:1574 ext4_evict_inode+0x1de/0x1890 fs/ext4/inode.c:400 evict+0x3c2/0xad0 fs/inode.c:822 dispose_list+0x117/0x1e0 fs/inode.c:864 prune_icache_sb+0xea/0x150 fs/inode.c:1010 super_cache_scan+0x376/0x550 fs/super.c:227 do_shrink_slab+0x411/0x1200 mm/shrinker.c:452 shrink_slab_memcg mm/shrinker.c:569 [inline] shrink_slab+0xa78/0x12d0 mm/shrinker.c:647 shrink_node_memcgs mm/vmscan.c:6440 [inline] shrink_node+0x7c1/0x4410 mm/vmscan.c:6482 shrink_zones mm/vmscan.c:6701 [inline] do_try_to_free_pages+0x2da/0x1500 mm/vmscan.c:6763 try_to_free_pages+0x2a0/0x740 mm/vmscan.c:7002 __perform_reclaim mm/page_alloc.c:4436 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:4459 [inline] __alloc_pages_slowpath mm/page_alloc.c:4939 [inline] __alloc_frozen_pages_noprof+0x1119/0x3280 mm/page_alloc.c:5457 alloc_pages_mpol+0x201/0x560 mm/mempolicy.c:2511 folio_alloc_mpol_noprof+0x36/0x260 mm/mempolicy.c:2530 __swap_cache_alloc mm/swap_state.c:458 [inline] __swap_cache_alloc_folio+0x3d7/0xc50 mm/swap_state.c:550 swap_cache_read_folio+0x47/0x150 mm/swap_state.c:714 swap_cache_read_folio_sync mm/swap_state.c:800 [inline] swap_cluster_readahead+0x477/0x5d0 mm/swap_state.c:922 swapin_readahead+0xf0/0x260 mm/swap_state.c:1061 do_swap_page+0xf95/0x53c0 mm/memory.c:5040 handle_pte_fault mm/memory.c:6630 [inline] __handle_mm_fault+0x15bd/0x2f60 mm/memory.c:6776 handle_mm_fault+0x363/0xa20 mm/memory.c:6943 do_user_addr_fault+0x745/0x12f0 arch/x86/mm/fault.c:1394 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0010:copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] RIP: 0010:raw_copy_to_user arch/x86/include/asm/uaccess_64.h:147 [inline] RIP: 0010:_inline_copy_to_user include/linux/uaccess.h:202 [inline] RIP: 0010:_copy_to_user+0x9f/0xd0 lib/usercopy.c:24 Code: 89 ee 48 89 ef e8 21 9b d6 fc 4d 85 ff 75 26 e8 37 a1 d6 fc 89 de 4c 89 e7 e8 5d 8d 4f fd 0f 01 cb 48 89 d9 48 89 ef 4c 89 e6 a4 0f 1f 00 0f 01 ca 48 89 cb e8 11 a1 d6 fc 48 89 d8 5b 5d 41 RSP: 0000:ffffc900035d7c88 EFLAGS: 00050246 RAX: 0000000000000001 RBX: 0000000000000010 RCX: 0000000000000010 RDX: 0000000000000001 RSI: ffffc900035d7ce0 RDI: 00007fff116fa100 RBP: 00007fff116fa100 R08: 0000000000000000 R09: fffff520006baf9d R10: ffffc900035d7cef R11: 0000000000000000 R12: ffffc900035d7ce0 R13: 00007fff116fa110 R14: 00007ffffffff000 R15: 0000000000000000 copy_to_user include/linux/uaccess.h:230 [inline] put_timespec64+0xb5/0x130 kernel/time/time.c:923 poll_select_finish+0x5a6/0x6c0 fs/select.c:343 __do_sys_ppoll fs/select.c:1113 [inline] __se_sys_ppoll fs/select.c:1092 [inline] __x64_sys_ppoll+0x2c7/0x350 fs/select.c:1092 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x121/0x770 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa5fe2fc407 Code: Unable to access opcode bytes at 0x7fa5fe2fc3dd. RSP: 002b:00007fff116fa0c0 EFLAGS: 00000202 ORIG_RAX: 000000000000010f RAX: ffffffffffffffda RBX: 00007fa5fe272780 RCX: 00007fa5fe2fc407 RDX: 00007fff116fa100 RSI: 0000000000000005 RDI: 0000558e666deba0 RBP: 00007fff116fa400 R08: 0000000000000008 R09: 0000000000000000 R10: 00007fff116fa400 R11: 0000000000000202 R12: 0000558e581645e0 R13: 0000558e666f6d40 R14: 0000000000000000 R15: 00007fff116fa1b0 Kernel Offset: disabled Rebooting in 86400 seconds.. ---------------- Code disassembly (best guess): 0: 89 ee mov %ebp,%esi 2: 48 89 ef mov %rbp,%rdi 5: e8 21 9b d6 fc call 0xfcd69b2b a: 4d 85 ff test %r15,%r15 d: 75 26 jne 0x35 f: e8 37 a1 d6 fc call 0xfcd6a14b 14: 89 de mov %ebx,%esi 16: 4c 89 e7 mov %r12,%rdi 19: e8 5d 8d 4f fd call 0xfd4f8d7b 1e: 0f 01 cb stac 21: 48 89 d9 mov %rbx,%rcx 24: 48 89 ef mov %rbp,%rdi 27: 4c 89 e6 mov %r12,%rsi * 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2c: 0f 1f 00 nopl (%rax) 2f: 0f 01 ca clac 32: 48 89 cb mov %rcx,%rbx 35: e8 11 a1 d6 fc call 0xfcd6a14b 3a: 48 89 d8 mov %rbx,%rax 3d: 5b pop %rbx 3e: 5d pop %rbp 3f: 41 rex.B