syzkaller login: [ 55.311188] BUG: Bad rss-counter state mm:000000003a4c8a2b type:MM_FILEPAGES val:33 [ 55.312270] BUG: Bad rss-counter state mm:000000003a4c8a2b type:MM_ANONPAGES val:22 [ 55.484018] ================================================================== [ 55.484951] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.485912] Read of size 8 at addr ffff88800dcb0310 by task sshd/223 [ 55.486698] [ 55.486924] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 55.487957] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.488940] Call Trace: [ 55.489263] [ 55.489546] dump_stack_lvl+0x91/0xf0 [ 55.490105] print_report+0xcc/0x620 [ 55.490597] ? __virt_addr_valid+0x102/0x340 [ 55.491158] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.491770] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.492380] kasan_report+0xbe/0xf0 [ 55.492856] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.493479] vma_interval_tree_remove+0xc75/0xec0 [ 55.494082] vma_prepare+0xc54/0x11a0 [ 55.494566] __split_vma+0x5af/0x950 [ 55.495047] ? __pfx___split_vma+0x10/0x10 [ 55.495574] ? find_held_lock+0x2c/0x110 [ 55.496096] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.496667] ? lock_is_held_type+0x9f/0x120 [ 55.497209] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.497817] ? mtree_range_walk+0x632/0x900 [ 55.498368] ? mas_walk+0x5c7/0x7c0 [ 55.498857] do_vmi_munmap+0x1f1/0x2b0 [ 55.499352] mmap_region+0x1f9/0x2660 [ 55.499827] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.500342] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.501047] ? __pfx_lock_acquire+0x10/0x10 [ 55.501579] ? __pfx_mmap_region+0x10/0x10 [ 55.502111] ? security_mmap_addr+0x7d/0xa0 [ 55.502652] ? get_unmapped_area+0x1f5/0x3f0 [ 55.503200] do_mmap+0x854/0xf00 [ 55.503645] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.504136] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.504703] ksys_mmap_pgoff+0x3af/0x500 [ 55.505217] do_syscall_64+0x3f/0x90 [ 55.505697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.506344] RIP: 0033:0x7fa0f1512d82 [ 55.506819] 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 [ 55.508943] RSP: 002b:00007ffc900206d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.509852] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa0f1512d82 [ 55.510722] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa0f094c000 [ 55.511572] RBP: 00007fa0f094c000 R08: 0000000000000009 R09: 0000000000001000 [ 55.512419] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557aae62f70 [ 55.513264] R13: 00007ffc900206f0 R14: 00007ffc90020720 R15: 00007ffc90020a80 [ 55.514119] [ 55.514411] [ 55.514644] Allocated by task 213: [ 55.515069] kasan_save_stack+0x22/0x50 [ 55.515571] kasan_set_track+0x25/0x30 [ 55.516066] __kasan_slab_alloc+0x59/0x70 [ 55.516588] kmem_cache_alloc+0x16b/0x370 [ 55.517105] vm_area_dup+0x20/0x160 [ 55.517563] __split_vma+0x170/0x950 [ 55.518031] split_vma+0xc6/0x110 [ 55.518475] mprotect_fixup+0x8d2/0xb30 [ 55.518990] do_mprotect_pkey+0x87e/0xd40 [ 55.519512] __x64_sys_mprotect+0x78/0xc0 [ 55.520030] do_syscall_64+0x3f/0x90 [ 55.520497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.521137] [ 55.521352] Freed by task 13: [ 55.521736] kasan_save_stack+0x22/0x50 [ 55.522246] kasan_set_track+0x25/0x30 [ 55.522751] kasan_save_free_info+0x2b/0x50 [ 55.523281] __kasan_slab_free+0x10a/0x190 [ 55.523813] kmem_cache_free+0x10d/0x4d0 [ 55.524321] rcu_core+0x8c8/0x2860 [ 55.524763] __do_softirq+0x1b7/0x7d4 [ 55.525237] [ 55.525455] Last potentially related work creation: [ 55.526040] kasan_save_stack+0x22/0x50 [ 55.526546] __kasan_record_aux_stack+0x8e/0xa0 [ 55.527137] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.527778] remove_vma+0x139/0x170 [ 55.528233] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.528856] do_vmi_munmap+0x1f1/0x2b0 [ 55.529339] __vm_munmap+0x138/0x3a0 [ 55.529803] __x64_sys_munmap+0x59/0x80 [ 55.530298] do_syscall_64+0x3f/0x90 [ 55.530791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.531437] [ 55.531654] The buggy address belongs to the object at ffff88800dcb02b8 [ 55.531654] which belongs to the cache vm_area_struct of size 168 [ 55.533127] The buggy address is located 88 bytes inside of [ 55.533127] freed 168-byte region [ffff88800dcb02b8, ffff88800dcb0360) [ 55.534532] [ 55.534753] The buggy address belongs to the physical page: [ 55.535416] page:000000008a6e6758 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcb0 [ 55.536500] memcg:ffff88800e49cd01 [ 55.536937] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 55.537635] page_type: 0xffffffff() [ 55.538083] raw: 0100000000000200 ffff88800879fc80 ffffea0000346ec0 dead000000000003 [ 55.539023] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e49cd01 [ 55.539936] page dumped because: kasan: bad access detected [ 55.540593] [ 55.540810] Memory state around the buggy address: [ 55.541395] ffff88800dcb0200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 55.542246] ffff88800dcb0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 55.543120] >ffff88800dcb0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 55.543975] ^ [ 55.544438] ffff88800dcb0380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.545294] ffff88800dcb0400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 55.546150] ================================================================== [ 55.547180] Disabling lock debugging due to kernel taint [ 57.292933] BUG: Bad rss-counter state mm:00000000b5f667ce type:MM_FILEPAGES val:33 [ 57.293484] BUG: Bad rss-counter state mm:00000000b5f667ce type:MM_ANONPAGES val:22 [ 57.733411] BUG: Bad rss-counter state mm:000000008571e518 type:MM_FILEPAGES val:33 [ 57.734420] BUG: Bad rss-counter state mm:000000008571e518 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2193' (ECDSA) to the list of known hosts. 2023/06/20 03:19:23 fuzzer started 2023/06/20 03:19:23 dialing manager at localhost:44161 2023/06/20 03:19:23 checking machine... 2023/06/20 03:19:23 checking revisions... [ 58.441230] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:19:23 testing simple program... [ 58.498741] cgroup: Unknown subsys name 'net' [ 58.560204] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:18:56 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f70ff8ad4a0 CR3=000000000cd36000 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=c3bad9e60349e9812b4aecf4033322a0 XMM02=2c67c8bc2e329bc3000000000011fc88 XMM03=fb795ef6d65770560000000000123c00 XMM04=ac45126cfb41cc2100000000000ae988 XMM05=e4cb8bb95a7664b60000000000133e88 XMM06=bc48b5cf6fac29650000000000132cf0 XMM07=e042d86d42eb936e0000000000123e80 XMM08=5986bb84ec4f64e1000000000011fce8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff81378542 RDX=1ffff1100d9e6a00 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=000000000000007f RSP=ffff88806cf09e68 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=fffffffffffffff6 R13=ffff88806cf09ee8 R14=ffff88806cf3a360 R15=0000000000000200 RIP=ffffffff81378573 RFL=00000216 [----AP-] 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 00007f371369c900 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=00007ffdea04d000 CR3=0000000019692000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000