syzkaller login: [ 30.804519] BUG: Bad rss-counter state mm:000000009a307000 type:MM_FILEPAGES val:33 [ 30.805764] BUG: Bad rss-counter state mm:000000009a307000 type:MM_ANONPAGES val:22 [ 30.857702] ================================================================== [ 30.858783] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.859821] Read of size 8 at addr ffff88801a1e5df0 by task sshd/220 [ 30.860673] [ 30.860915] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.861888] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.862969] Call Trace: [ 30.863327] [ 30.863648] dump_stack_lvl+0x91/0xf0 [ 30.864198] print_report+0xcc/0x620 [ 30.864745] ? __virt_addr_valid+0x102/0x340 [ 30.865364] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.866053] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.866739] kasan_report+0xbe/0xf0 [ 30.867270] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.867964] vma_interval_tree_remove+0xc75/0xec0 [ 30.868634] vma_prepare+0xc54/0x11a0 [ 30.869169] __split_vma+0x5af/0x950 [ 30.869717] ? __pfx___split_vma+0x10/0x10 [ 30.870304] ? find_held_lock+0x2c/0x110 [ 30.870896] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.871527] ? lock_is_held_type+0x9f/0x120 [ 30.872135] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.872812] ? mtree_range_walk+0x632/0x900 [ 30.873433] ? mas_walk+0x5c7/0x7c0 [ 30.873972] do_vmi_munmap+0x1f1/0x2b0 [ 30.874525] mmap_region+0x1f9/0x2660 [ 30.875063] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.875635] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.876431] ? __pfx_lock_acquire+0x10/0x10 [ 30.877033] ? __pfx_mmap_region+0x10/0x10 [ 30.877646] ? security_mmap_addr+0x7d/0xa0 [ 30.878242] ? get_unmapped_area+0x1f5/0x3f0 [ 30.878854] do_mmap+0x854/0xf00 [ 30.879347] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.879901] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.880532] ksys_mmap_pgoff+0x3af/0x500 [ 30.881097] do_syscall_64+0x3f/0x90 [ 30.881641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.882370] RIP: 0033:0x7f9a91894d82 [ 30.882882] 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 [ 30.885363] RSP: 002b:00007ffe73135328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.886404] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9a91894d82 [ 30.887350] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9a90cce000 [ 30.888300] RBP: 00007f9a90cce000 R08: 0000000000000009 R09: 0000000000001000 [ 30.889250] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cef80c1f70 [ 30.890207] R13: 00007ffe73135340 R14: 00007ffe73135370 R15: 00007ffe731356d0 [ 30.891165] [ 30.891494] [ 30.891737] Allocated by task 213: [ 30.892221] kasan_save_stack+0x22/0x50 [ 30.892788] kasan_set_track+0x25/0x30 [ 30.893342] __kasan_slab_alloc+0x59/0x70 [ 30.893940] kmem_cache_alloc+0x16b/0x370 [ 30.894516] vm_area_dup+0x20/0x160 [ 30.895025] __split_vma+0x170/0x950 [ 30.895545] split_vma+0xc6/0x110 [ 30.896044] mprotect_fixup+0x8d2/0xb30 [ 30.896608] do_mprotect_pkey+0x87e/0xd40 [ 30.897195] __x64_sys_mprotect+0x78/0xc0 [ 30.897792] do_syscall_64+0x3f/0x90 [ 30.898321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.899041] [ 30.899282] Freed by task 213: [ 30.899716] kasan_save_stack+0x22/0x50 [ 30.900274] kasan_set_track+0x25/0x30 [ 30.900826] kasan_save_free_info+0x2b/0x50 [ 30.901418] __kasan_slab_free+0x10a/0x190 [ 30.902019] kmem_cache_free+0x10d/0x4d0 [ 30.902588] rcu_core+0x8c8/0x2860 [ 30.903088] __do_softirq+0x1b7/0x7d4 [ 30.903624] [ 30.903863] Last potentially related work creation: [ 30.904520] kasan_save_stack+0x22/0x50 [ 30.905081] __kasan_record_aux_stack+0x8e/0xa0 [ 30.905739] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.906458] remove_vma+0x139/0x170 [ 30.906961] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.907585] do_vmi_munmap+0x1f1/0x2b0 [ 30.908127] __vm_munmap+0x138/0x3a0 [ 30.908645] __x64_sys_munmap+0x59/0x80 [ 30.909203] do_syscall_64+0x3f/0x90 [ 30.909739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.910456] [ 30.910697] The buggy address belongs to the object at ffff88801a1e5d98 [ 30.910697] which belongs to the cache vm_area_struct of size 168 [ 30.912333] The buggy address is located 88 bytes inside of [ 30.912333] freed 168-byte region [ffff88801a1e5d98, ffff88801a1e5e40) [ 30.913919] [ 30.914160] The buggy address belongs to the physical page: [ 30.914902] page:0000000042e0500a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1e5 [ 30.916133] memcg:ffff888016722301 [ 30.916615] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.917350] page_type: 0xffffffff() [ 30.917873] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.918908] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016722301 [ 30.919929] page dumped because: kasan: bad access detected [ 30.920672] [ 30.920915] Memory state around the buggy address: [ 30.921586] ffff88801a1e5c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.922547] ffff88801a1e5d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.923511] >ffff88801a1e5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.924467] ^ [ 30.925379] ffff88801a1e5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.926353] ffff88801a1e5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.927306] ================================================================== [ 30.928489] Disabling lock debugging due to kernel taint [ 32.998278] BUG: Bad rss-counter state mm:0000000014e34651 type:MM_FILEPAGES val:33 [ 32.999462] BUG: Bad rss-counter state mm:0000000014e34651 type:MM_ANONPAGES val:22 [ 33.484284] BUG: Bad rss-counter state mm:000000006142e2e2 type:MM_FILEPAGES val:33 [ 33.485340] BUG: Bad rss-counter state mm:000000006142e2e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24449' (ECDSA) to the list of known hosts. 2023/06/21 08:35:45 fuzzer started 2023/06/21 08:35:45 dialing manager at localhost:36067 2023/06/21 08:35:45 checking machine... 2023/06/21 08:35:45 checking revisions... [ 34.178001] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:35:45 testing simple program... [ 34.227078] cgroup: Unknown subsys name 'net' [ 34.263227] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:35:45 Registers: info registers vcpu 0 RAX=ffffffff8450cc7f RBX=ffffffff813ad470 RCX=ffffffff863b3501 RDX=1ffff11003931f1a RSI=ffffffff8450cc7f RDI=ffff88801c98f940 RBP=ffff88801c98f910 RSP=ffff88801c98f870 R8 =ffffffff863b3588 R9 =ffff88801c98f8b8 R10=0000000000038001 R11=000000000008a96a R12=ffff88801c98f940 R13=0000000000000000 R14=ffff88800ddb3680 R15=0000000000092cc0 RIP=ffffffff84538440 RFL=00000282 [--S----] 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 00007f94a2b1a900 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=000055964b7b0954 CR3=000000001a3a4000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=0000000000000001 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=00007f2f78b7d500 CR3=000000000c57e000 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=81286df3d15767be5e43fabfa2eaf500 XMM02=000000000011a218eff9b2d0a8fce9cb XMM03=000000000011a2e82c67c8bc2e329bc3 XMM04=6c22735036d0204c00000000000ae988 XMM05=3bb6f602ee64f9e500000000001320a8 XMM06=4fda316b135da52b00000000001314d0 XMM07=e042d86d42eb936e0000000000121a80 XMM08=4e2750126eac1936000000000011a2e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000