syzkaller login: [ 43.721589] BUG: Bad rss-counter state mm:0000000070c45b9f type:MM_FILEPAGES val:33 [ 43.722624] BUG: Bad rss-counter state mm:0000000070c45b9f type:MM_ANONPAGES val:22 [ 43.896111] ================================================================== [ 43.897040] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.897994] Read of size 8 at addr ffff88800d9f9880 by task sshd/220 [ 43.898775] [ 43.899005] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.900153] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.901378] Call Trace: [ 43.901763] [ 43.902101] dump_stack_lvl+0x91/0xf0 [ 43.902702] print_report+0xcc/0x620 [ 43.903314] ? __virt_addr_valid+0x102/0x340 [ 43.903976] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.904740] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.905537] kasan_report+0xbe/0xf0 [ 43.906124] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.906908] vma_interval_tree_remove+0xc75/0xec0 [ 43.907685] vma_prepare+0xc54/0x11a0 [ 43.908285] __split_vma+0x5af/0x950 [ 43.908882] ? __pfx___split_vma+0x10/0x10 [ 43.909583] ? find_held_lock+0x2c/0x110 [ 43.910229] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.910983] ? lock_is_held_type+0x9f/0x120 [ 43.911669] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.912308] ? mtree_range_walk+0x632/0x900 [ 43.912862] ? mas_walk+0x5c7/0x7c0 [ 43.913369] do_vmi_munmap+0x1f1/0x2b0 [ 43.913874] mmap_region+0x1f9/0x2660 [ 43.914377] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.914890] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.915660] ? __pfx_lock_acquire+0x10/0x10 [ 43.916210] ? __pfx_mmap_region+0x10/0x10 [ 43.916755] ? security_mmap_addr+0x7d/0xa0 [ 43.917329] ? get_unmapped_area+0x1f5/0x3f0 [ 43.917891] do_mmap+0x854/0xf00 [ 43.918363] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.918861] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.919463] ksys_mmap_pgoff+0x3af/0x500 [ 43.919979] do_syscall_64+0x3f/0x90 [ 43.920482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.921132] RIP: 0033:0x7f1f1c120d82 [ 43.921632] 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 [ 43.923832] RSP: 002b:00007fff5fdb2a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.924764] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f1c120d82 [ 43.925649] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f1b55a000 [ 43.926514] RBP: 00007f1f1b55a000 R08: 0000000000000009 R09: 0000000000001000 [ 43.927399] R10: 0000000000000812 R11: 0000000000000206 R12: 00005555baaecf70 [ 43.928260] R13: 00007fff5fdb2a40 R14: 00007fff5fdb2a70 R15: 00007fff5fdb2dd0 [ 43.929130] [ 43.929455] [ 43.929678] Allocated by task 212: [ 43.930117] kasan_save_stack+0x22/0x50 [ 43.930651] kasan_set_track+0x25/0x30 [ 43.931173] __kasan_slab_alloc+0x59/0x70 [ 43.931728] kmem_cache_alloc+0x16b/0x370 [ 43.932252] vm_area_dup+0x20/0x160 [ 43.932727] __split_vma+0x170/0x950 [ 43.933193] split_vma+0xc6/0x110 [ 43.933655] mprotect_fixup+0x8d2/0xb30 [ 43.934168] do_mprotect_pkey+0x87e/0xd40 [ 43.934702] __x64_sys_mprotect+0x78/0xc0 [ 43.935236] do_syscall_64+0x3f/0x90 [ 43.935725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.936406] [ 43.936631] Freed by task 212: [ 43.937034] kasan_save_stack+0x22/0x50 [ 43.937565] kasan_set_track+0x25/0x30 [ 43.938066] kasan_save_free_info+0x2b/0x50 [ 43.938626] __kasan_slab_free+0x10a/0x190 [ 43.939186] kmem_cache_free+0x10d/0x4d0 [ 43.939712] rcu_core+0x8c8/0x2860 [ 43.940167] __do_softirq+0x1b7/0x7d4 [ 43.940660] [ 43.940875] Last potentially related work creation: [ 43.941500] kasan_save_stack+0x22/0x50 [ 43.942021] __kasan_record_aux_stack+0x8e/0xa0 [ 43.942616] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.943292] remove_vma+0x139/0x170 [ 43.943755] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.944332] do_vmi_munmap+0x1f1/0x2b0 [ 43.944818] __vm_munmap+0x138/0x3a0 [ 43.945305] __x64_sys_munmap+0x59/0x80 [ 43.945820] do_syscall_64+0x3f/0x90 [ 43.946314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.946979] [ 43.947198] The buggy address belongs to the object at ffff88800d9f9828 [ 43.947198] which belongs to the cache vm_area_struct of size 168 [ 43.948704] The buggy address is located 88 bytes inside of [ 43.948704] freed 168-byte region [ffff88800d9f9828, ffff88800d9f98d0) [ 43.950406] [ 43.950698] The buggy address belongs to the physical page: [ 43.951620] page:00000000947a6ead refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9f9 [ 43.953040] memcg:ffff88800e388101 [ 43.953500] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.954151] page_type: 0xffffffff() [ 43.954650] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.955696] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e388101 [ 43.956625] page dumped because: kasan: bad access detected [ 43.957314] [ 43.957536] Memory state around the buggy address: [ 43.958124] ffff88800d9f9780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 43.959021] ffff88800d9f9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 43.959897] >ffff88800d9f9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 43.960758] ^ [ 43.961172] ffff88800d9f9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.962054] ffff88800d9f9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 43.962957] ================================================================== [ 43.964051] Disabling lock debugging due to kernel taint [ 45.933401] BUG: Bad rss-counter state mm:00000000f182a0db type:MM_FILEPAGES val:33 [ 45.934486] BUG: Bad rss-counter state mm:00000000f182a0db type:MM_ANONPAGES val:22 [ 46.496027] BUG: Bad rss-counter state mm:0000000005618a56 type:MM_FILEPAGES val:33 [ 46.497311] BUG: Bad rss-counter state mm:0000000005618a56 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50537' (ECDSA) to the list of known hosts. 2023/06/20 04:18:23 fuzzer started 2023/06/20 04:18:23 dialing manager at localhost:44161 2023/06/20 04:18:23 checking machine... 2023/06/20 04:18:23 checking revisions... [ 47.121699] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:18:23 testing simple program... [ 47.168005] cgroup: Unknown subsys name 'net' [ 47.206079] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:18:23 Registers: info registers vcpu 0 RAX=1ffff110033d1af7 RBX=ffff888019e8d788 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888019e8d7b8 RBP=ffff8880197cd490 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff8880197cd608 R14=ffffffff813782a8 R15=ffff88800e2de880 RIP=ffffffff8184636c 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 00007fd6b1f21900 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=00007f8d31808650 CR3=000000000d538000 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=6cf28660fe985f9f4944aa4e28a18cf3 XMM02=000000000011de78d59e07bde36eea69 XMM03=000000000011dfa0ec2efd57dc4c00df XMM04=011f9b6c338fc27400000000000ae988 XMM05=72459516db0e44e80000000000135c90 XMM06=19e9129bd510f2350000000000134b48 XMM07=fb795ef6d657705600000000001249d0 XMM08=2c67c8bc2e329bc3000000000011dfa0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf35000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff110012b4e8a RSP=ffff8880095a7430 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000eb100000eb1 R12=ffffffff8560b640 R13=ffffffff83ab421f R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff8135b929 RFL=00000202 [-------] 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 00007f8d31253900 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=00007f8d3180a618 CR3=000000001996c000 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