syzkaller login: [ 30.251771] BUG: Bad rss-counter state mm:00000000407fa14b type:MM_FILEPAGES val:33 [ 30.252973] BUG: Bad rss-counter state mm:00000000407fa14b type:MM_ANONPAGES val:22 [ 30.295949] ================================================================== [ 30.297245] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.298294] Read of size 8 at addr ffff88800ea85ed8 by task sshd/221 [ 30.298981] [ 30.299124] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.299666] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.300430] Call Trace: [ 30.300641] [ 30.300829] dump_stack_lvl+0x91/0xf0 [ 30.301147] print_report+0xcc/0x620 [ 30.301494] ? __virt_addr_valid+0x102/0x340 [ 30.302125] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.302763] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.303626] kasan_report+0xbe/0xf0 [ 30.304277] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.305016] vma_interval_tree_remove+0xc75/0xec0 [ 30.305495] vma_prepare+0xc54/0x11a0 [ 30.305875] __split_vma+0x5af/0x950 [ 30.306248] ? __pfx___split_vma+0x10/0x10 [ 30.306667] ? find_held_lock+0x2c/0x110 [ 30.307085] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.307533] ? lock_is_held_type+0x9f/0x120 [ 30.307958] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.308437] ? mtree_range_walk+0x632/0x900 [ 30.308883] ? mas_walk+0x5c7/0x7c0 [ 30.309258] do_vmi_munmap+0x1f1/0x2b0 [ 30.309649] mmap_region+0x1f9/0x2660 [ 30.310033] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.310442] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.311007] ? __pfx_lock_acquire+0x10/0x10 [ 30.311425] ? __pfx_mmap_region+0x10/0x10 [ 30.311845] ? security_mmap_addr+0x7d/0xa0 [ 30.312261] ? get_unmapped_area+0x1f5/0x3f0 [ 30.312709] do_mmap+0x854/0xf00 [ 30.313056] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.313449] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.313894] ksys_mmap_pgoff+0x3af/0x500 [ 30.314299] do_syscall_64+0x3f/0x90 [ 30.314678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.315190] RIP: 0033:0x7f496f23ad82 [ 30.315556] 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 [ 30.317238] RSP: 002b:00007ffc83de3d58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.317955] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f496f23ad82 [ 30.318620] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f496e674000 [ 30.319281] RBP: 00007f496e674000 R08: 0000000000000009 R09: 0000000000001000 [ 30.319949] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb6354fec0 [ 30.320613] R13: 00007ffc83de3d70 R14: 00007ffc83de3da0 R15: 00007ffc83de4100 [ 30.321300] [ 30.321531] [ 30.321701] Allocated by task 214: [ 30.322039] kasan_save_stack+0x22/0x50 [ 30.322439] kasan_set_track+0x25/0x30 [ 30.322832] __kasan_slab_alloc+0x59/0x70 [ 30.323243] kmem_cache_alloc+0x16b/0x370 [ 30.323651] vm_area_dup+0x20/0x160 [ 30.324011] __split_vma+0x170/0x950 [ 30.324380] split_vma+0xc6/0x110 [ 30.324735] mprotect_fixup+0x8d2/0xb30 [ 30.325131] do_mprotect_pkey+0x87e/0xd40 [ 30.325541] __x64_sys_mprotect+0x78/0xc0 [ 30.325955] do_syscall_64+0x3f/0x90 [ 30.326332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.326844] [ 30.327017] Freed by task 214: [ 30.327327] kasan_save_stack+0x22/0x50 [ 30.327722] kasan_set_track+0x25/0x30 [ 30.328112] kasan_save_free_info+0x2b/0x50 [ 30.328531] __kasan_slab_free+0x10a/0x190 [ 30.328974] kmem_cache_free+0x10d/0x4d0 [ 30.329376] rcu_core+0x8c8/0x2860 [ 30.329731] __do_softirq+0x1b7/0x7d4 [ 30.330110] [ 30.330279] Last potentially related work creation: [ 30.330736] kasan_save_stack+0x22/0x50 [ 30.331136] __kasan_record_aux_stack+0x8e/0xa0 [ 30.331589] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.332101] remove_vma+0x139/0x170 [ 30.332460] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.332916] do_vmi_munmap+0x1f1/0x2b0 [ 30.333302] __vm_munmap+0x138/0x3a0 [ 30.333671] __x64_sys_munmap+0x59/0x80 [ 30.334068] do_syscall_64+0x3f/0x90 [ 30.334444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.334951] [ 30.335124] The buggy address belongs to the object at ffff88800ea85e80 [ 30.335124] which belongs to the cache vm_area_struct of size 168 [ 30.336273] The buggy address is located 88 bytes inside of [ 30.336273] freed 168-byte region [ffff88800ea85e80, ffff88800ea85f28) [ 30.337492] [ 30.337664] The buggy address belongs to the physical page: [ 30.338182] page:0000000076cd46c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea85 [ 30.339036] memcg:ffff888013f1bc01 [ 30.339371] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.339929] page_type: 0xffffffff() [ 30.340283] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 30.341008] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f1bc01 [ 30.341717] page dumped because: kasan: bad access detected [ 30.342235] [ 30.342406] Memory state around the buggy address: [ 30.342863] ffff88800ea85d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.343533] ffff88800ea85e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.344207] >ffff88800ea85e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.344881] ^ [ 30.345449] ffff88800ea85f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.346121] ffff88800ea85f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.346786] ================================================================== [ 30.347630] Disabling lock debugging due to kernel taint [ 32.198774] BUG: Bad rss-counter state mm:000000001760637a type:MM_FILEPAGES val:33 [ 32.200594] BUG: Bad rss-counter state mm:000000001760637a type:MM_ANONPAGES val:22 [ 32.732919] BUG: Bad rss-counter state mm:00000000e22a044e type:MM_FILEPAGES val:33 [ 32.733924] BUG: Bad rss-counter state mm:00000000e22a044e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40685' (ECDSA) to the list of known hosts. 2023/06/20 23:42:06 fuzzer started 2023/06/20 23:42:06 dialing manager at localhost:36067 2023/06/20 23:42:06 checking machine... 2023/06/20 23:42:06 checking revisions... [ 33.364540] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:42:07 testing simple program... [ 33.413198] cgroup: Unknown subsys name 'net' [ 33.451021] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:42:06 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000014 RCX=00007f268746ad77 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8450cc8c RBP=00007ffefda19dc0 RSP=ffff888018277f88 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000206 R12=0000000000000000 R13=00007ffefda19d30 R14=0000000000000009 R15=0000558eff081ad0 RIP=ffffffff84600139 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 00007f2686f83900 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=00007f268753a618 CR3=000000000ff4e000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f059ffb5280 CR3=000000000d68c000 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=e7c0b60fd3b995a00e4dc9d07b375152 XMM02=ec2efd57dc4c00df0000000000119de0 XMM03=0f2a5edf02e6c95e0000000000119eb0 XMM04=501811f4554d4e3a00000000000ae988 XMM05=e4cb8bb95a7664b600000000001315e0 XMM06=c291bd5c70af25b90000000000131468 XMM07=e042d86d42eb936e0000000000121978 XMM08=0f2a5edf02e6c95e0000000000119eb0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000