syzkaller login: [ 31.593039] BUG: Bad rss-counter state mm:00000000d496004f type:MM_FILEPAGES val:33 [ 31.594353] BUG: Bad rss-counter state mm:00000000d496004f type:MM_ANONPAGES val:22 [ 31.741368] ================================================================== [ 31.742279] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.743227] Read of size 8 at addr ffff88800fb99968 by task sshd/221 [ 31.743993] [ 31.744208] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.745303] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.746276] Call Trace: [ 31.746591] [ 31.746877] dump_stack_lvl+0x91/0xf0 [ 31.747402] print_report+0xcc/0x620 [ 31.747881] ? __virt_addr_valid+0x102/0x340 [ 31.748437] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.749042] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.749658] kasan_report+0xbe/0xf0 [ 31.750131] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.750774] vma_interval_tree_remove+0xc75/0xec0 [ 31.751419] vma_prepare+0xc54/0x11a0 [ 31.751924] __split_vma+0x5af/0x950 [ 31.752431] ? __pfx___split_vma+0x10/0x10 [ 31.752998] ? find_held_lock+0x2c/0x110 [ 31.753550] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.754152] ? lock_is_held_type+0x9f/0x120 [ 31.754739] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.755407] ? mtree_range_walk+0x632/0x900 [ 31.755999] ? mas_walk+0x5c7/0x7c0 [ 31.756520] do_vmi_munmap+0x1f1/0x2b0 [ 31.757044] mmap_region+0x1f9/0x2660 [ 31.757563] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.758120] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.758904] ? __pfx_lock_acquire+0x10/0x10 [ 31.759480] ? __pfx_mmap_region+0x10/0x10 [ 31.760039] ? security_mmap_addr+0x7d/0xa0 [ 31.760593] ? get_unmapped_area+0x1f5/0x3f0 [ 31.761169] do_mmap+0x854/0xf00 [ 31.761637] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.762155] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.762742] ksys_mmap_pgoff+0x3af/0x500 [ 31.763290] do_syscall_64+0x3f/0x90 [ 31.763788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.764455] RIP: 0033:0x7f6737a58d82 [ 31.764936] 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 [ 31.767158] RSP: 002b:00007fffc057ce68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.768056] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6737a58d82 [ 31.768899] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6736e92000 [ 31.769735] RBP: 00007f6736e92000 R08: 0000000000000009 R09: 0000000000001000 [ 31.770577] R10: 0000000000000812 R11: 0000000000000206 R12: 00005628ecb6aec0 [ 31.771430] R13: 00007fffc057ce80 R14: 00007fffc057ceb0 R15: 00007fffc057d210 [ 31.772285] [ 31.772576] [ 31.772792] Allocated by task 214: [ 31.773217] kasan_save_stack+0x22/0x50 [ 31.773714] kasan_set_track+0x25/0x30 [ 31.774203] __kasan_slab_alloc+0x59/0x70 [ 31.774726] kmem_cache_alloc+0x16b/0x370 [ 31.775255] vm_area_dup+0x20/0x160 [ 31.775712] __split_vma+0x170/0x950 [ 31.776181] split_vma+0xc6/0x110 [ 31.776622] mprotect_fixup+0x8d2/0xb30 [ 31.777121] do_mprotect_pkey+0x87e/0xd40 [ 31.777634] __x64_sys_mprotect+0x78/0xc0 [ 31.778153] do_syscall_64+0x3f/0x90 [ 31.778627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.779272] [ 31.779485] Freed by task 214: [ 31.779873] kasan_save_stack+0x22/0x50 [ 31.780374] kasan_set_track+0x25/0x30 [ 31.780864] kasan_save_free_info+0x2b/0x50 [ 31.781392] __kasan_slab_free+0x10a/0x190 [ 31.781925] kmem_cache_free+0x10d/0x4d0 [ 31.782429] rcu_core+0x8c8/0x2860 [ 31.782866] __do_softirq+0x1b7/0x7d4 [ 31.783360] [ 31.783577] Last potentially related work creation: [ 31.784163] kasan_save_stack+0x22/0x50 [ 31.784667] __kasan_record_aux_stack+0x8e/0xa0 [ 31.785240] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.785881] remove_vma+0x139/0x170 [ 31.786330] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.786884] do_vmi_munmap+0x1f1/0x2b0 [ 31.787386] __vm_munmap+0x138/0x3a0 [ 31.787848] __x64_sys_munmap+0x59/0x80 [ 31.788340] do_syscall_64+0x3f/0x90 [ 31.788816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.789453] [ 31.789668] The buggy address belongs to the object at ffff88800fb99910 [ 31.789668] which belongs to the cache vm_area_struct of size 168 [ 31.791135] The buggy address is located 88 bytes inside of [ 31.791135] freed 168-byte region [ffff88800fb99910, ffff88800fb999b8) [ 31.792551] [ 31.792817] The buggy address belongs to the physical page: [ 31.793504] page:00000000cdb8ad1c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb99 [ 31.794632] memcg:ffff8880098c8d01 [ 31.795075] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.795770] page_type: 0xffffffff() [ 31.796238] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.797193] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880098c8d01 [ 31.798142] page dumped because: kasan: bad access detected [ 31.798823] [ 31.799045] Memory state around the buggy address: [ 31.799649] ffff88800fb99800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.800543] ffff88800fb99880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.801444] >ffff88800fb99900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.802339] ^ [ 31.803154] ffff88800fb99980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.804044] ffff88800fb99a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.804928] ================================================================== [ 31.806220] Disabling lock debugging due to kernel taint [ 34.107779] BUG: Bad rss-counter state mm:0000000095516647 type:MM_FILEPAGES val:33 [ 34.108928] BUG: Bad rss-counter state mm:0000000095516647 type:MM_ANONPAGES val:22 [ 34.528002] BUG: Bad rss-counter state mm:000000001cb55cd1 type:MM_FILEPAGES val:33 [ 34.529036] BUG: Bad rss-counter state mm:000000001cb55cd1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28544' (ECDSA) to the list of known hosts. 2023/06/21 08:01:14 fuzzer started 2023/06/21 08:01:14 dialing manager at localhost:36067 2023/06/21 08:01:14 checking machine... 2023/06/21 08:01:14 checking revisions... [ 35.205749] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:01:15 testing simple program... [ 35.250306] cgroup: Unknown subsys name 'net' [ 35.304527] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:01:14 Registers: info registers vcpu 0 RAX=ffffffff83640612 RBX=0000000000000007 RCX=0000000000000001 RDX=0000000000000800 RSI=000000000000000b RDI=ffff8880145ef5a0 RBP=dffffc0000000000 RSP=ffff8880145ef4b8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000b R13=0000000000000800 R14=ffff8880145ef568 R15=ffff88800dcd7850 RIP=ffffffff813ad625 RFL=00000283 [--S---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 00007f67a447a900 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=00007f67a4a31618 CR3=0000000016ae8000 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=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=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=00007fdef6f61600 CR3=000000000dd6c000 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=f75c21701cc69682a04f69d5e166760d XMM02=ec2efd57dc4c00df000000000011ba48 XMM03=bcd99e6f77915732000000000011bb18 XMM04=4614607d779d45b600000000000ae988 XMM05=e4cb8bb95a7664b600000000001326e0 XMM06=c291bd5c70af25b90000000000132568 XMM07=e042d86d42eb936e0000000000122b18 XMM08=bcd99e6f77915732000000000011bb18 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000