syzkaller login: [ 31.055974] BUG: Bad rss-counter state mm:000000002cab85a2 type:MM_FILEPAGES val:33 [ 31.057743] BUG: Bad rss-counter state mm:000000002cab85a2 type:MM_ANONPAGES val:22 [ 31.226521] ================================================================== [ 31.227639] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.228755] Read of size 8 at addr ffff88801a292880 by task sshd/221 [ 31.229658] [ 31.229888] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.230753] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.231762] Call Trace: [ 31.232094] [ 31.232381] dump_stack_lvl+0x91/0xf0 [ 31.232877] print_report+0xcc/0x620 [ 31.233363] ? __virt_addr_valid+0x102/0x340 [ 31.233926] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.234548] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.235196] kasan_report+0xbe/0xf0 [ 31.235674] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.236295] vma_interval_tree_remove+0xc75/0xec0 [ 31.236890] vma_prepare+0xc54/0x11a0 [ 31.237375] __split_vma+0x5af/0x950 [ 31.237854] ? __pfx___split_vma+0x10/0x10 [ 31.238385] ? find_held_lock+0x2c/0x110 [ 31.238926] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.239497] ? lock_is_held_type+0x9f/0x120 [ 31.240031] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.240638] ? mtree_range_walk+0x632/0x900 [ 31.241190] ? mas_walk+0x5c7/0x7c0 [ 31.241659] do_vmi_munmap+0x1f1/0x2b0 [ 31.242146] mmap_region+0x1f9/0x2660 [ 31.242627] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.243166] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.243880] ? __pfx_lock_acquire+0x10/0x10 [ 31.244422] ? __pfx_mmap_region+0x10/0x10 [ 31.244983] ? security_mmap_addr+0x7d/0xa0 [ 31.245519] ? get_unmapped_area+0x1f5/0x3f0 [ 31.246077] do_mmap+0x854/0xf00 [ 31.246516] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.247046] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.247612] ksys_mmap_pgoff+0x3af/0x500 [ 31.248130] do_syscall_64+0x3f/0x90 [ 31.248661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.249313] RIP: 0033:0x7f9ade67cd82 [ 31.249772] 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 [ 31.251913] RSP: 002b:00007ffc72929278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.252868] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ade67cd82 [ 31.253761] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9addab6000 [ 31.254603] RBP: 00007f9addab6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.255511] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d16cbbcec0 [ 31.256373] R13: 00007ffc72929290 R14: 00007ffc729292c0 R15: 00007ffc72929620 [ 31.257227] [ 31.257531] [ 31.257752] Allocated by task 214: [ 31.258178] kasan_save_stack+0x22/0x50 [ 31.258688] kasan_set_track+0x25/0x30 [ 31.259210] __kasan_slab_alloc+0x59/0x70 [ 31.259740] kmem_cache_alloc+0x16b/0x370 [ 31.260256] vm_area_dup+0x20/0x160 [ 31.260718] __split_vma+0x170/0x950 [ 31.261185] split_vma+0xc6/0x110 [ 31.261621] mprotect_fixup+0x8d2/0xb30 [ 31.262135] do_mprotect_pkey+0x87e/0xd40 [ 31.262655] __x64_sys_mprotect+0x78/0xc0 [ 31.263188] do_syscall_64+0x3f/0x90 [ 31.263669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.264338] [ 31.264559] Freed by task 214: [ 31.264965] kasan_save_stack+0x22/0x50 [ 31.265471] kasan_set_track+0x25/0x30 [ 31.265973] kasan_save_free_info+0x2b/0x50 [ 31.266501] __kasan_slab_free+0x10a/0x190 [ 31.267062] kmem_cache_free+0x10d/0x4d0 [ 31.267566] rcu_core+0x8c8/0x2860 [ 31.268015] __do_softirq+0x1b7/0x7d4 [ 31.268505] [ 31.268721] Last potentially related work creation: [ 31.269300] kasan_save_stack+0x22/0x50 [ 31.269804] __kasan_record_aux_stack+0x8e/0xa0 [ 31.270383] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.271039] remove_vma+0x139/0x170 [ 31.271487] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.272057] do_vmi_munmap+0x1f1/0x2b0 [ 31.272564] __vm_munmap+0x138/0x3a0 [ 31.273032] __x64_sys_munmap+0x59/0x80 [ 31.273540] do_syscall_64+0x3f/0x90 [ 31.274020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.274664] [ 31.274889] The buggy address belongs to the object at ffff88801a292828 [ 31.274889] which belongs to the cache vm_area_struct of size 168 [ 31.276346] The buggy address is located 88 bytes inside of [ 31.276346] freed 168-byte region [ffff88801a292828, ffff88801a2928d0) [ 31.277761] [ 31.277975] The buggy address belongs to the physical page: [ 31.278634] page:0000000008a4a6d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a292 [ 31.279737] memcg:ffff88800e1ee201 [ 31.280161] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.280808] page_type: 0xffffffff() [ 31.281263] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.282200] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1ee201 [ 31.283181] page dumped because: kasan: bad access detected [ 31.283882] [ 31.284112] Memory state around the buggy address: [ 31.284703] ffff88801a292780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.285560] ffff88801a292800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.286455] >ffff88801a292880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.287358] ^ [ 31.287774] ffff88801a292900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.288626] ffff88801a292980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.289489] ================================================================== [ 31.290595] Disabling lock debugging due to kernel taint [ 33.336240] BUG: Bad rss-counter state mm:000000004b8366fe type:MM_FILEPAGES val:33 [ 33.337233] BUG: Bad rss-counter state mm:000000004b8366fe type:MM_ANONPAGES val:22 [ 33.836347] BUG: Bad rss-counter state mm:00000000c3e953d1 type:MM_FILEPAGES val:33 [ 33.837730] BUG: Bad rss-counter state mm:00000000c3e953d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52552' (ECDSA) to the list of known hosts. 2023/06/20 11:56:43 fuzzer started 2023/06/20 11:56:43 dialing manager at localhost:36067 2023/06/20 11:56:43 checking machine... 2023/06/20 11:56:43 checking revisions... [ 34.578568] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:56:43 testing simple program... [ 34.624427] cgroup: Unknown subsys name 'net' [ 34.676105] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:56:43 Registers: info registers vcpu 0 RAX=1ffff110033b3bdb RBX=ffff888019d9dea8 RCX=1ffff110019fa83a RDX=dffffc0000000000 RSI=ffff88800fd113a0 RDI=ffff888019d9ded8 RBP=ffff88800b923c58 RSP=ffff88801632fbc8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800fd11380 R13=0000000000000000 R14=ffff88800d60ec28 R15=ffff88800d60ebe0 RIP=ffffffff8184767e 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 00007f5e49c9d900 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=00007f5e4a2550b0 CR3=000000001bfe2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=1ffff110028ddf0c RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff8880146ef850 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6d7d R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ead 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f694dc34900 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=00007f694d0b6810 CR3=000000000f630000 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=498e739fc694968b624305521f5e0922 XMM02=000000000011d990eff9b2d0a8fce9cb XMM03=000000000011da602c67c8bc2e329bc3 XMM04=05e9ef4454b3641e00000000000ae988 XMM05=7f117592e084c73e0000000000134590 XMM06=c291bd5c70af25b90000000000133630 XMM07=e042d86d42eb936e0000000000124370 XMM08=ff92c1aa4bfd4d0f000000000011da60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000