general protection fault, probably for non-canonical address 0xdffffc00000000eb: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000758-0x000000000000075f] CPU: 1 PID: 16835 Comm: syz.3.12155 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:f2fs_release_page+0x312/0x7d0 fs/f2fs/data.c:3615 Code: 4d 03 27 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 3f eb 97 ff 41 bf 58 07 00 00 4d 03 3c 24 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 1d 04 00 00 45 8b 3f 44 89 fe 81 e6 00 RSP: 0018:ffffc90000c35e50 EFLAGS: 00010206 RAX: 00000000000000eb RBX: ffffea0004d74f40 RCX: ffff8881081ea780 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000c35e88 R08: dffffc0000000000 R09: fffff940009ae9e9 R10: fffff940009ae9e9 R11: 1ffffd40009ae9e8 R12: ffff88811320c3c8 R13: dffffc0000000000 R14: 1ffffd40009ae9e9 R15: 0000000000000758 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000112d5c000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: try_to_release_page+0x18d/0x1e0 mm/filemap.c:3705 shrink_page_list+0x16b5/0x4120 mm/vmscan.c:1467 shrink_inactive_list+0x4f4/0xe80 mm/vmscan.c:2075 shrink_list mm/vmscan.c:2294 [inline] shrink_lruvec+0x2246/0x2770 mm/vmscan.c:5473 shrink_node_memcgs mm/vmscan.c:5660 [inline] shrink_node+0xf0c/0x2690 mm/vmscan.c:5690 shrink_zones mm/vmscan.c:5896 [inline] do_try_to_free_pages+0x5db/0x1560 mm/vmscan.c:5954 try_to_free_mem_cgroup_pages+0x233/0x5b0 mm/vmscan.c:6272 try_charge+0x42b/0x14e0 mm/memcontrol.c:2745 __mem_cgroup_charge+0x14c/0x6d0 mm/memcontrol.c:6871 mem_cgroup_charge include/linux/memcontrol.h:458 [inline] __add_to_page_cache_locked+0x1e7/0x980 mm/filemap.c:854 add_to_page_cache_lru+0xa7/0x210 mm/filemap.c:948 pagecache_get_page+0x704/0x930 mm/filemap.c:1859 grab_cache_page_write_begin+0x59/0xb0 mm/filemap.c:3459 simple_write_begin+0x36/0x290 fs/libfs.c:531 generic_perform_write+0x2be/0x510 mm/filemap.c:3509 __generic_file_write_iter+0x24b/0x480 mm/filemap.c:3638 generic_file_write_iter+0xa9/0x1d0 mm/filemap.c:3670 __kernel_write+0x55a/0x910 fs/read_write.c:550 dump_emit+0x240/0x360 fs/coredump.c:855 dump_user_range+0x6a/0x1a0 fs/coredump.c:908 elf_core_dump+0x278a/0x2bc0 fs/binfmt_elf.c:2290 do_coredump+0x1ac9/0x27f0 fs/coredump.c:817 get_signal+0xf23/0x12e0 kernel/signal.c:2779 arch_do_signal_or_restart+0xbf/0x10f0 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199 irqentry_exit_to_user_mode+0x9/0x10 kernel/entry/common.c:287 irqentry_exit+0x12/0x60 kernel/entry/common.c:375 exc_page_fault+0x67/0xc0 arch/x86/mm/fault.c:1487 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571 RIP: 0033:0x7f1870c31987 Code: 88 15 72 5d ec 00 88 05 6f 5d ec 00 c3 50 48 8d 35 19 26 1c 00 48 8d 3d 1f 26 1c 00 31 c0 e8 20 f7 ff ff 53 89 fb 48 83 ec 10 <64> 8b 04 25 94 ff ff ff 85 c0 74 2a 89 fe 31 c0 bf 3c 00 00 00 e8 RSP: 002b:00007f186f7ba120 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 000000000000000b RCX: 00007f1870d70fc9 RDX: 00007f186f7ba140 RSI: 00007f186f7ba270 RDI: 000000000000000b RBP: 00007f1870df3f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007f1870fc8038 R14: 00007f1870fc7fa0 R15: 00007ffc3a6dcfb8 Modules linked in: ---[ end trace 1fbe25b97de53d3e ]--- RIP: 0010:f2fs_release_page+0x312/0x7d0 fs/f2fs/data.c:3615 Code: 4d 03 27 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 3f eb 97 ff 41 bf 58 07 00 00 4d 03 3c 24 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 1d 04 00 00 45 8b 3f 44 89 fe 81 e6 00 RSP: 0018:ffffc90000c35e50 EFLAGS: 00010206 RAX: 00000000000000eb RBX: ffffea0004d74f40 RCX: ffff8881081ea780 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000c35e88 R08: dffffc0000000000 R09: fffff940009ae9e9 R10: fffff940009ae9e9 R11: 1ffffd40009ae9e8 R12: ffff88811320c3c8 R13: dffffc0000000000 R14: 1ffffd40009ae9e9 R15: 0000000000000758 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31b1cff8 CR3: 0000000112d5c000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 4d 03 27 add (%r15),%r12 3: 4c 89 e0 mov %r12,%rax 6: 48 c1 e8 03 shr $0x3,%rax a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) f: 74 08 je 0x19 11: 4c 89 e7 mov %r12,%rdi 14: e8 3f eb 97 ff call 0xff97eb58 19: 41 bf 58 07 00 00 mov $0x758,%r15d 1f: 4d 03 3c 24 add (%r12),%r15 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 1d 04 00 00 jne 0x454 37: 45 8b 3f mov (%r15),%r15d 3a: 44 89 fe mov %r15d,%esi 3d: 81 .byte 0x81 3e: e6 00 out %al,$0x0