[ 23.623354] BUG: Bad rss-counter state mm:00000000fd51127b type:MM_FILEPAGES val:33 [ 23.623852] BUG: Bad rss-counter state mm:00000000fd51127b type:MM_ANONPAGES val:22 [ 23.721409] ================================================================== [ 23.722055] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.722710] Read of size 8 at addr ffff8880193a1968 by task sshd/218 [ 23.723249] [ 23.723404] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.724005] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.724823] Call Trace: [ 23.725049] [ 23.725250] dump_stack_lvl+0x91/0xf0 [ 23.725596] print_report+0xcc/0x620 [ 23.725936] ? __virt_addr_valid+0x102/0x340 [ 23.726323] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.726793] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.727226] kasan_report+0xbe/0xf0 [ 23.727562] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.728002] vma_interval_tree_remove+0xc75/0xec0 [ 23.728440] vma_prepare+0xc54/0x11a0 [ 23.728781] __split_vma+0x5af/0x950 [ 23.729115] ? __pfx___split_vma+0x10/0x10 [ 23.729487] ? find_held_lock+0x2c/0x110 [ 23.729861] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.730261] ? lock_is_held_type+0x9f/0x120 [ 23.730638] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.731068] ? mtree_range_walk+0x632/0x900 [ 23.731462] ? mas_walk+0x5c7/0x7c0 [ 23.731797] do_vmi_munmap+0x1f1/0x2b0 [ 23.732169] mmap_region+0x1f9/0x2660 [ 23.732510] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.732839] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.733198] ? __pfx_lock_acquire+0x10/0x10 [ 23.733466] ? __pfx_mmap_region+0x10/0x10 [ 23.733734] ? security_mmap_addr+0x7d/0xa0 [ 23.734008] ? get_unmapped_area+0x1f5/0x3f0 [ 23.734287] do_mmap+0x854/0xf00 [ 23.734509] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.734758] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.735040] ksys_mmap_pgoff+0x3af/0x500 [ 23.735297] do_syscall_64+0x3f/0x90 [ 23.735569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.735934] RIP: 0033:0x7fb94e8d2d82 [ 23.736200] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 23.737289] RSP: 002b:00007fff67175ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.737801] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb94e8d2d82 [ 23.738267] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb94dd0c000 [ 23.738730] RBP: 00007fb94dd0c000 R08: 0000000000000009 R09: 0000000000001000 [ 23.739192] R10: 0000000000000812 R11: 0000000000000206 R12: 00005601db847f70 [ 23.739657] R13: 00007fff67175f10 R14: 00007fff67175f40 R15: 00007fff671762a0 [ 23.740148] [ 23.740308] [ 23.740426] Allocated by task 207: [ 23.740661] kasan_save_stack+0x22/0x50 [ 23.740947] kasan_set_track+0x25/0x30 [ 23.741214] __kasan_slab_alloc+0x59/0x70 [ 23.741502] kmem_cache_alloc+0x16b/0x370 [ 23.741787] vm_area_dup+0x20/0x160 [ 23.742035] __split_vma+0x170/0x950 [ 23.742290] split_vma+0xc6/0x110 [ 23.742531] mprotect_fixup+0x8d2/0xb30 [ 23.742805] do_mprotect_pkey+0x87e/0xd40 [ 23.743092] __x64_sys_mprotect+0x78/0xc0 [ 23.743379] do_syscall_64+0x3f/0x90 [ 23.743639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.743995] [ 23.744122] Freed by task 13: [ 23.744332] kasan_save_stack+0x22/0x50 [ 23.744608] kasan_set_track+0x25/0x30 [ 23.744876] kasan_save_free_info+0x2b/0x50 [ 23.745178] __kasan_slab_free+0x10a/0x190 [ 23.745468] kmem_cache_free+0x10d/0x4d0 [ 23.745750] rcu_core+0x8c8/0x2860 [ 23.745994] __do_softirq+0x1b7/0x7d4 [ 23.746255] [ 23.746370] Last potentially related work creation: [ 23.746687] kasan_save_stack+0x22/0x50 [ 23.746958] __kasan_record_aux_stack+0x8e/0xa0 [ 23.747264] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.747620] remove_vma+0x139/0x170 [ 23.747868] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.748190] do_vmi_munmap+0x1f1/0x2b0 [ 23.748459] __vm_munmap+0x138/0x3a0 [ 23.748712] __x64_sys_munmap+0x59/0x80 [ 23.748985] do_syscall_64+0x3f/0x90 [ 23.749250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.749601] [ 23.749717] The buggy address belongs to the object at ffff8880193a1910 [ 23.749717] which belongs to the cache vm_area_struct of size 168 [ 23.750517] The buggy address is located 88 bytes inside of [ 23.750517] freed 168-byte region [ffff8880193a1910, ffff8880193a19b8) [ 23.751302] [ 23.751422] The buggy address belongs to the physical page: [ 23.751790] page:00000000ca3034f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x193a1 [ 23.752394] memcg:ffff88800fdcba01 [ 23.752632] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.752996] page_type: 0xffffffff() [ 23.753249] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.753760] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdcba01 [ 23.754267] page dumped because: kasan: bad access detected [ 23.754632] [ 23.754751] Memory state around the buggy address: [ 23.755064] ffff8880193a1800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 23.755538] ffff8880193a1880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 23.756023] >ffff8880193a1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.756502] ^ [ 23.756932] ffff8880193a1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 23.757410] ffff8880193a1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.757883] ================================================================== [ 23.758428] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.275968] BUG: Bad rss-counter state mm:0000000070e9bdf6 type:MM_FILEPAGES val:33 [ 26.277065] BUG: Bad rss-counter state mm:0000000070e9bdf6 type:MM_ANONPAGES val:22 [ 26.743925] BUG: Bad rss-counter state mm:00000000bfd4c06a type:MM_FILEPAGES val:33 [ 26.744977] BUG: Bad rss-counter state mm:00000000bfd4c06a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20649' (ECDSA) to the list of known hosts. 2023/06/20 22:02:08 fuzzer started 2023/06/20 22:02:08 dialing manager at localhost:36067 2023/06/20 22:02:08 checking machine... 2023/06/20 22:02:08 checking revisions... [ 27.407142] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:02:08 testing simple program... [ 27.451295] cgroup: Unknown subsys name 'net' [ 27.504951] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:02:08 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffc6f310388 CR3=0000000005482000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00007fa32c3af5100000555671b5d790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001c1d013 RBX=ffff88800e0e8068 RCX=1ffff11001b935b6 RDX=dffffc0000000000 RSI=ffff888016cfb000 RDI=ffff88800e0e8098 RBP=ffff88800953c078 RSP=ffff8880143bf4b8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888016cfa000 R13=0000000000000000 R14=ffff88800d7ea178 R15=ffff88800d7ea130 RIP=ffffffff8184767e RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6b8acbf900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f6b8b276618 CR3=000000001ab7c000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000