[ 23.680497] BUG: Bad rss-counter state mm:0000000088b7af6c type:MM_FILEPAGES val:33 [ 23.682415] BUG: Bad rss-counter state mm:0000000088b7af6c type:MM_ANONPAGES val:22 [ 23.837245] ================================================================== [ 23.838140] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.839081] Read of size 8 at addr ffff888019f39d08 by task sshd/219 [ 23.839963] [ 23.840186] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.841071] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.842066] Call Trace: [ 23.842394] [ 23.842676] dump_stack_lvl+0x91/0xf0 [ 23.843168] print_report+0xcc/0x620 [ 23.843667] ? __virt_addr_valid+0x102/0x340 [ 23.844237] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.844853] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.845470] kasan_report+0xbe/0xf0 [ 23.845946] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.846567] vma_interval_tree_remove+0xc75/0xec0 [ 23.847167] vma_prepare+0xc54/0x11a0 [ 23.847651] __split_vma+0x5af/0x950 [ 23.848122] ? __pfx___split_vma+0x10/0x10 [ 23.848681] ? find_held_lock+0x2c/0x110 [ 23.849205] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.849772] ? lock_is_held_type+0x9f/0x120 [ 23.850311] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.850915] ? mtree_range_walk+0x632/0x900 [ 23.851468] ? mas_walk+0x5c7/0x7c0 [ 23.851943] do_vmi_munmap+0x1f1/0x2b0 [ 23.852449] mmap_region+0x1f9/0x2660 [ 23.852938] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.853445] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.854154] ? __pfx_lock_acquire+0x10/0x10 [ 23.854688] ? __pfx_mmap_region+0x10/0x10 [ 23.855215] ? security_mmap_addr+0x7d/0xa0 [ 23.855755] ? get_unmapped_area+0x1f5/0x3f0 [ 23.856314] do_mmap+0x854/0xf00 [ 23.856761] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.857255] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.857818] ksys_mmap_pgoff+0x3af/0x500 [ 23.858324] do_syscall_64+0x3f/0x90 [ 23.858803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.859454] RIP: 0033:0x7f54a99add82 [ 23.859917] 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 [ 23.862055] RSP: 002b:00007ffda7a040b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.862955] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54a99add82 [ 23.863808] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54a8de7000 [ 23.864655] RBP: 00007f54a8de7000 R08: 0000000000000009 R09: 0000000000001000 [ 23.865495] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564dd8c6bf70 [ 23.866342] R13: 00007ffda7a040d0 R14: 00007ffda7a04100 R15: 00007ffda7a04460 [ 23.867186] [ 23.867489] [ 23.867710] Allocated by task 212: [ 23.868149] kasan_save_stack+0x22/0x50 [ 23.868667] kasan_set_track+0x25/0x30 [ 23.869160] __kasan_slab_alloc+0x59/0x70 [ 23.869688] kmem_cache_alloc+0x16b/0x370 [ 23.870221] vm_area_dup+0x20/0x160 [ 23.870686] __split_vma+0x170/0x950 [ 23.871151] split_vma+0xc6/0x110 [ 23.871588] mprotect_fixup+0x8d2/0xb30 [ 23.872093] do_mprotect_pkey+0x87e/0xd40 [ 23.872623] __x64_sys_mprotect+0x78/0xc0 [ 23.873144] do_syscall_64+0x3f/0x90 [ 23.873619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.874260] [ 23.874477] Freed by task 212: [ 23.874868] kasan_save_stack+0x22/0x50 [ 23.875367] kasan_set_track+0x25/0x30 [ 23.875856] kasan_save_free_info+0x2b/0x50 [ 23.876401] __kasan_slab_free+0x10a/0x190 [ 23.876941] kmem_cache_free+0x10d/0x4d0 [ 23.877447] rcu_core+0x8c8/0x2860 [ 23.877890] __do_softirq+0x1b7/0x7d4 [ 23.878369] [ 23.878586] Last potentially related work creation: [ 23.879169] kasan_save_stack+0x22/0x50 [ 23.879679] __kasan_record_aux_stack+0x8e/0xa0 [ 23.880252] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.880891] remove_vma+0x139/0x170 [ 23.881342] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.881897] do_vmi_munmap+0x1f1/0x2b0 [ 23.882388] __vm_munmap+0x138/0x3a0 [ 23.882860] __x64_sys_munmap+0x59/0x80 [ 23.883359] do_syscall_64+0x3f/0x90 [ 23.883831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.884496] [ 23.884710] The buggy address belongs to the object at ffff888019f39cb0 [ 23.884710] which belongs to the cache vm_area_struct of size 168 [ 23.886177] The buggy address is located 88 bytes inside of [ 23.886177] freed 168-byte region [ffff888019f39cb0, ffff888019f39d58) [ 23.887586] [ 23.887802] The buggy address belongs to the physical page: [ 23.888487] page:0000000013c24354 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f39 [ 23.889584] memcg:ffff8880189e0a01 [ 23.890015] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.890659] page_type: 0xffffffff() [ 23.891108] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.892026] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880189e0a01 [ 23.892943] page dumped because: kasan: bad access detected [ 23.893611] [ 23.893832] Memory state around the buggy address: [ 23.894411] ffff888019f39c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 23.895272] ffff888019f39c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 23.896127] >ffff888019f39d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 23.896989] ^ [ 23.897429] ffff888019f39d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 23.898289] ffff888019f39e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 23.899142] ================================================================== [ 23.900109] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.152388] BUG: Bad rss-counter state mm:00000000f71e8140 type:MM_FILEPAGES val:33 [ 26.153311] BUG: Bad rss-counter state mm:00000000f71e8140 type:MM_ANONPAGES val:22 [ 26.617716] BUG: Bad rss-counter state mm:000000004d79085c type:MM_FILEPAGES val:33 [ 26.618886] BUG: Bad rss-counter state mm:000000004d79085c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55398' (ECDSA) to the list of known hosts. 2023/06/20 20:22:04 fuzzer started 2023/06/20 20:22:05 dialing manager at localhost:36067 2023/06/20 20:22:05 checking machine... 2023/06/20 20:22:05 checking revisions... [ 27.321041] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:22:05 testing simple program... [ 27.370097] cgroup: Unknown subsys name 'net' [ 27.470825] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:22:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000001000 RCX=ffffffff81979e57 RDX=1ffffd40000bffc0 RSI=0000000000000000 RDI=0000000000000000 RBP=ffffea00005ffe00 RSP=ffff888016aafa90 R8 =0000000000000000 R9 =fffff940000bffc0 R10=ffffea00005ffe07 R11=00000000000b6d53 R12=0000000000000000 R13=ffffffff81b28f30 R14=0000000000800000 R15=ffffea00005ffe20 RIP=ffffffff814c03a4 RFL=00000246 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff6161d0900 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=00007ff61561faa0 CR3=000000000cb7e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=19bb642f5ede893100000000000ae988 XMM05=6bf0a0692d28b25700000000001322b8 XMM06=806171799158d9670000000000130300 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888009728e80 RBX=ffff888009731068 RCX=1ffff11001278a86 RDX=dffffc0000000000 RSI=ffff8880097815e8 RDI=ffff8880097310a0 RBP=ffff888009731078 RSP=ffff888016507a78 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888009781500 R13=0000000000000000 R14=ffff88800ef47048 R15=ffff88800ef47000 RIP=ffffffff81847695 RFL=00000093 [--S-A-C] 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 00007f630ff2b900 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=00007f63104e2618 CR3=000000000e414000 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