syzkaller login: [ 40.149724] BUG: Bad rss-counter state mm:0000000062e675e5 type:MM_FILEPAGES val:33 [ 40.151222] BUG: Bad rss-counter state mm:0000000062e675e5 type:MM_ANONPAGES val:22 [ 40.329020] ================================================================== [ 40.330045] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.331090] Read of size 8 at addr ffff88800f01c228 by task sshd/221 [ 40.332046] [ 40.332311] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.333265] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.334368] Call Trace: [ 40.334721] [ 40.335032] dump_stack_lvl+0x91/0xf0 [ 40.335575] print_report+0xcc/0x620 [ 40.336117] ? __virt_addr_valid+0x102/0x340 [ 40.336726] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.337411] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.338093] kasan_report+0xbe/0xf0 [ 40.338622] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.339310] vma_interval_tree_remove+0xc75/0xec0 [ 40.339985] vma_prepare+0xc54/0x11a0 [ 40.340518] __split_vma+0x5af/0x950 [ 40.341040] ? __pfx___split_vma+0x10/0x10 [ 40.341624] ? find_held_lock+0x2c/0x110 [ 40.342202] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.342824] ? lock_is_held_type+0x9f/0x120 [ 40.343418] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.344102] ? mtree_range_walk+0x632/0x900 [ 40.344712] ? mas_walk+0x5c7/0x7c0 [ 40.345236] do_vmi_munmap+0x1f1/0x2b0 [ 40.345781] mmap_region+0x1f9/0x2660 [ 40.346313] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.346876] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.347677] ? __pfx_lock_acquire+0x10/0x10 [ 40.348268] ? __pfx_mmap_region+0x10/0x10 [ 40.348850] ? security_mmap_addr+0x7d/0xa0 [ 40.349428] ? get_unmapped_area+0x1f5/0x3f0 [ 40.350027] do_mmap+0x854/0xf00 [ 40.350503] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.351054] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.351704] ksys_mmap_pgoff+0x3af/0x500 [ 40.352243] do_syscall_64+0x3f/0x90 [ 40.352756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.353458] RIP: 0033:0x7fddd88b3d82 [ 40.353956] 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 [ 40.356272] RSP: 002b:00007ffd9b210f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.357234] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fddd88b3d82 [ 40.358172] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fddd7ced000 [ 40.359086] RBP: 00007fddd7ced000 R08: 0000000000000009 R09: 0000000000001000 [ 40.359999] R10: 0000000000000812 R11: 0000000000000206 R12: 000056235f3eaec0 [ 40.360925] R13: 00007ffd9b210f20 R14: 00007ffd9b210f50 R15: 00007ffd9b2112b0 [ 40.361863] [ 40.362192] [ 40.362420] Allocated by task 214: [ 40.362876] kasan_save_stack+0x22/0x50 [ 40.363415] kasan_set_track+0x25/0x30 [ 40.363963] __kasan_slab_alloc+0x59/0x70 [ 40.364523] kmem_cache_alloc+0x16b/0x370 [ 40.365076] vm_area_dup+0x20/0x160 [ 40.365561] __split_vma+0x170/0x950 [ 40.366058] split_vma+0xc6/0x110 [ 40.366531] mprotect_fixup+0x8d2/0xb30 [ 40.367067] do_mprotect_pkey+0x87e/0xd40 [ 40.367651] __x64_sys_mprotect+0x78/0xc0 [ 40.368233] do_syscall_64+0x3f/0x90 [ 40.368766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.369474] [ 40.369709] Freed by task 204: [ 40.370144] kasan_save_stack+0x22/0x50 [ 40.370705] kasan_set_track+0x25/0x30 [ 40.371258] kasan_save_free_info+0x2b/0x50 [ 40.371859] __kasan_slab_free+0x10a/0x190 [ 40.372455] kmem_cache_free+0x10d/0x4d0 [ 40.373018] rcu_core+0x8c8/0x2860 [ 40.373504] __do_softirq+0x1b7/0x7d4 [ 40.374094] [ 40.374333] Last potentially related work creation: [ 40.374990] kasan_save_stack+0x22/0x50 [ 40.375552] __kasan_record_aux_stack+0x8e/0xa0 [ 40.376208] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.376914] remove_vma+0x139/0x170 [ 40.377415] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.378032] do_vmi_munmap+0x1f1/0x2b0 [ 40.378572] __vm_munmap+0x138/0x3a0 [ 40.379087] __x64_sys_munmap+0x59/0x80 [ 40.379647] do_syscall_64+0x3f/0x90 [ 40.380181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.380887] [ 40.381124] The buggy address belongs to the object at ffff88800f01c1d0 [ 40.381124] which belongs to the cache vm_area_struct of size 168 [ 40.382755] The buggy address is located 88 bytes inside of [ 40.382755] freed 168-byte region [ffff88800f01c1d0, ffff88800f01c278) [ 40.384345] [ 40.384582] The buggy address belongs to the physical page: [ 40.385323] page:0000000027fd35f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf01c [ 40.386522] memcg:ffff8880182e4301 [ 40.386987] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.387766] page_type: 0xffffffff() [ 40.388267] raw: 0100000000000200 ffff88800879fc80 ffffea00003cb880 dead000000000003 [ 40.389291] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880182e4301 [ 40.390301] page dumped because: kasan: bad access detected [ 40.391033] [ 40.391271] Memory state around the buggy address: [ 40.391939] ffff88800f01c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.392894] ffff88800f01c180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 40.393857] >ffff88800f01c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.394799] ^ [ 40.395422] ffff88800f01c280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 40.396371] ffff88800f01c300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 40.397323] ================================================================== [ 40.398395] Disabling lock debugging due to kernel taint [ 43.305438] BUG: Bad rss-counter state mm:00000000a0a810c2 type:MM_FILEPAGES val:33 [ 43.306451] BUG: Bad rss-counter state mm:00000000a0a810c2 type:MM_ANONPAGES val:22 [ 43.807171] BUG: Bad rss-counter state mm:00000000eba42409 type:MM_FILEPAGES val:33 [ 43.808158] BUG: Bad rss-counter state mm:00000000eba42409 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8062' (ECDSA) to the list of known hosts. 2023/06/19 20:17:53 fuzzer started 2023/06/19 20:17:53 dialing manager at localhost:44161 2023/06/19 20:17:53 checking machine... 2023/06/19 20:17:53 checking revisions... [ 44.609925] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:17:53 testing simple program... [ 44.660705] cgroup: Unknown subsys name 'net' [ 44.702819] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:17:51 Registers: info registers vcpu 0 RAX=ffffffff8180ae86 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff8180ae86 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000021ee6 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800f7a9b40 R15=ffff88800eb1aa00 RIP=ffffffff813ad424 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 00007f6460b29900 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=00007f64610e0618 CR3=000000000fe98000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fc8b077ea10 CR3=000000000ea34000 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=37313a3032203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323937 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000