syzkaller login: [ 30.700106] BUG: Bad rss-counter state mm:000000008bc4b9d5 type:MM_FILEPAGES val:33 [ 30.701133] BUG: Bad rss-counter state mm:000000008bc4b9d5 type:MM_ANONPAGES val:22 [ 30.861251] ================================================================== [ 30.862392] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.863523] Read of size 8 at addr ffff88800bf57c20 by task sshd/220 [ 30.864578] [ 30.864865] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.865925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.866996] Call Trace: [ 30.867313] [ 30.867591] dump_stack_lvl+0x91/0xf0 [ 30.868095] print_report+0xcc/0x620 [ 30.868652] ? __virt_addr_valid+0x102/0x340 [ 30.869329] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.870019] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.870615] kasan_report+0xbe/0xf0 [ 30.871068] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.871652] vma_interval_tree_remove+0xc75/0xec0 [ 30.872218] vma_prepare+0xc54/0x11a0 [ 30.872670] __split_vma+0x5af/0x950 [ 30.873118] ? __pfx___split_vma+0x10/0x10 [ 30.873616] ? find_held_lock+0x2c/0x110 [ 30.874108] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.874673] ? lock_is_held_type+0x9f/0x120 [ 30.875203] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.875791] ? mtree_range_walk+0x632/0x900 [ 30.876343] ? mas_walk+0x5c7/0x7c0 [ 30.876819] do_vmi_munmap+0x1f1/0x2b0 [ 30.877320] mmap_region+0x1f9/0x2660 [ 30.877806] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.878326] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.879036] ? __pfx_lock_acquire+0x10/0x10 [ 30.879590] ? __pfx_mmap_region+0x10/0x10 [ 30.880122] ? security_mmap_addr+0x7d/0xa0 [ 30.880660] ? get_unmapped_area+0x1f5/0x3f0 [ 30.881206] do_mmap+0x854/0xf00 [ 30.881642] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.882149] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.882710] ksys_mmap_pgoff+0x3af/0x500 [ 30.883216] do_syscall_64+0x3f/0x90 [ 30.883693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.884348] RIP: 0033:0x7f4bc5177d82 [ 30.884811] 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 [ 30.886946] RSP: 002b:00007ffe5cf338f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.887799] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4bc5177d82 [ 30.888613] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4bc45b1000 [ 30.889419] RBP: 00007f4bc45b1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.890285] R10: 0000000000000812 R11: 0000000000000206 R12: 000055abab7adec0 [ 30.891137] R13: 00007ffe5cf33910 R14: 00007ffe5cf33940 R15: 00007ffe5cf33ca0 [ 30.892020] [ 30.892314] [ 30.892532] Allocated by task 213: [ 30.892960] kasan_save_stack+0x22/0x50 [ 30.893466] kasan_set_track+0x25/0x30 [ 30.893964] __kasan_slab_alloc+0x59/0x70 [ 30.894500] kmem_cache_alloc+0x16b/0x370 [ 30.895016] vm_area_dup+0x20/0x160 [ 30.895475] __split_vma+0x170/0x950 [ 30.895937] split_vma+0xc6/0x110 [ 30.896374] mprotect_fixup+0x8d2/0xb30 [ 30.896871] do_mprotect_pkey+0x87e/0xd40 [ 30.897385] __x64_sys_mprotect+0x78/0xc0 [ 30.897902] do_syscall_64+0x3f/0x90 [ 30.898387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.899031] [ 30.899240] Freed by task 213: [ 30.899633] kasan_save_stack+0x22/0x50 [ 30.900140] kasan_set_track+0x25/0x30 [ 30.900635] kasan_save_free_info+0x2b/0x50 [ 30.901166] __kasan_slab_free+0x10a/0x190 [ 30.901701] kmem_cache_free+0x10d/0x4d0 [ 30.902227] rcu_core+0x8c8/0x2860 [ 30.902670] __do_softirq+0x1b7/0x7d4 [ 30.903147] [ 30.903362] Last potentially related work creation: [ 30.903948] kasan_save_stack+0x22/0x50 [ 30.904448] __kasan_record_aux_stack+0x8e/0xa0 [ 30.905037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.905744] remove_vma+0x139/0x170 [ 30.906210] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.906773] do_vmi_munmap+0x1f1/0x2b0 [ 30.907262] __vm_munmap+0x138/0x3a0 [ 30.907727] __x64_sys_munmap+0x59/0x80 [ 30.908217] do_syscall_64+0x3f/0x90 [ 30.908698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.909335] [ 30.909554] The buggy address belongs to the object at ffff88800bf57bc8 [ 30.909554] which belongs to the cache vm_area_struct of size 168 [ 30.911045] The buggy address is located 88 bytes inside of [ 30.911045] freed 168-byte region [ffff88800bf57bc8, ffff88800bf57c70) [ 30.912362] [ 30.912569] The buggy address belongs to the physical page: [ 30.913250] page:0000000042571da1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xbf57 [ 30.914352] memcg:ffff8880169d4801 [ 30.914778] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.915414] page_type: 0xffffffff() [ 30.915857] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.916780] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169d4801 [ 30.917676] page dumped because: kasan: bad access detected [ 30.918335] [ 30.918547] Memory state around the buggy address: [ 30.919121] ffff88800bf57b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.920003] ffff88800bf57b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.920876] >ffff88800bf57c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.921767] ^ [ 30.922338] ffff88800bf57c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.923237] ffff88800bf57d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.924116] ================================================================== [ 30.925195] Disabling lock debugging due to kernel taint [ 33.246733] BUG: Bad rss-counter state mm:00000000db6b11e5 type:MM_FILEPAGES val:33 [ 33.248073] BUG: Bad rss-counter state mm:00000000db6b11e5 type:MM_ANONPAGES val:22 [ 33.736907] BUG: Bad rss-counter state mm:0000000019a6ff07 type:MM_FILEPAGES val:33 [ 33.738147] BUG: Bad rss-counter state mm:0000000019a6ff07 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8377' (ECDSA) to the list of known hosts. 2023/06/20 17:02:36 fuzzer started 2023/06/20 17:02:37 dialing manager at localhost:36067 2023/06/20 17:02:37 checking machine... 2023/06/20 17:02:37 checking revisions... [ 34.423121] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:02:37 testing simple program... [ 34.471028] cgroup: Unknown subsys name 'net' [ 34.507836] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:02:36 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffccc591d08 CR3=000000000ec84000 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=2036333a32303a3731203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a32303a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff816cb50b RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002064e56 RSI=ffffffff816cb50b RDI=ffff888010327320 RBP=ffff8880103272f0 RSP=ffff888010327250 R8 =0000000000000001 R9 =ffff888010327298 R10=0000000000038001 R11=0000000000020d03 R12=ffff888010327320 R13=0000000000000000 R14=ffff888019efd1c0 R15=00000000000928c0 RIP=ffffffff813ad470 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 00007f61359b8900 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=00007f6135f6f618 CR3=00000000164aa000 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