syzkaller login: [ 91.646280] BUG: Bad rss-counter state mm:00000000cd41b16b type:MM_FILEPAGES val:33 [ 91.647820] BUG: Bad rss-counter state mm:00000000cd41b16b type:MM_ANONPAGES val:22 [ 91.794835] ================================================================== [ 91.795831] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 91.796842] Read of size 8 at addr ffff88800fe39140 by task sshd/222 [ 91.797847] [ 91.798081] CPU: 1 PID: 222 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 91.799167] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 91.800237] Call Trace: [ 91.800579] <TASK> [ 91.800885] dump_stack_lvl+0x91/0xf0 [ 91.801409] print_report+0xcc/0x620 [ 91.801928] ? __virt_addr_valid+0x102/0x340 [ 91.802524] ? vma_interval_tree_remove+0xc75/0xec0 [ 91.803175] ? vma_interval_tree_remove+0xc75/0xec0 [ 91.803853] kasan_report+0xbe/0xf0 [ 91.804353] ? vma_interval_tree_remove+0xc75/0xec0 [ 91.805012] vma_interval_tree_remove+0xc75/0xec0 [ 91.805643] vma_prepare+0xc54/0x11a0 [ 91.806147] __split_vma+0x5af/0x950 [ 91.806648] ? __pfx___split_vma+0x10/0x10 [ 91.807212] ? find_held_lock+0x2c/0x110 [ 91.807768] do_vmi_align_munmap+0x2ba/0x11f0 [ 91.808386] ? lock_is_held_type+0x9f/0x120 [ 91.808967] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 91.809630] ? mtree_range_walk+0x632/0x900 [ 91.810222] ? mas_walk+0x5c7/0x7c0 [ 91.810740] do_vmi_munmap+0x1f1/0x2b0 [ 91.811281] mmap_region+0x1f9/0x2660 [ 91.811815] ? vm_mmap_pgoff+0x15c/0x3a0 [ 91.812379] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 91.813162] ? __pfx_lock_acquire+0x10/0x10 [ 91.813742] ? __pfx_mmap_region+0x10/0x10 [ 91.814317] ? security_mmap_addr+0x7d/0xa0 [ 91.814902] ? get_unmapped_area+0x1f5/0x3f0 [ 91.815501] do_mmap+0x854/0xf00 [ 91.815990] vm_mmap_pgoff+0x1a6/0x3a0 [ 91.816536] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 91.817141] ksys_mmap_pgoff+0x3af/0x500 [ 91.817700] do_syscall_64+0x3f/0x90 [ 91.818221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 91.818928] RIP: 0033:0x7f9ea80cbd82 [ 91.819422] 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 [ 91.821759] RSP: 002b:00007ffd5f3b2028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 91.822746] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ea80cbd82 [ 91.823676] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ea7505000 [ 91.824596] RBP: 00007f9ea7505000 R08: 0000000000000009 R09: 0000000000001000 [ 91.825515] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587d870cec0 [ 91.826428] R13: 00007ffd5f3b2040 R14: 00007ffd5f3b2070 R15: 00007ffd5f3b23d0 [ 91.827360] </TASK> [ 91.827686] [ 91.827922] Allocated by task 215: [ 91.828388] kasan_save_stack+0x22/0x50 [ 91.828935] kasan_set_track+0x25/0x30 [ 91.829474] __kasan_slab_alloc+0x59/0x70 [ 91.830041] kmem_cache_alloc+0x16b/0x370 [ 91.830603] vm_area_dup+0x20/0x160 [ 91.831093] __split_vma+0x170/0x950 [ 91.831600] split_vma+0xc6/0x110 [ 91.832096] mprotect_fixup+0x8d2/0xb30 [ 91.832637] do_mprotect_pkey+0x87e/0xd40 [ 91.833209] __x64_sys_mprotect+0x78/0xc0 [ 91.833771] do_syscall_64+0x3f/0x90 [ 91.834284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 91.834982] [ 91.835219] Freed by task 215: [ 91.835658] kasan_save_stack+0x22/0x50 [ 91.836208] kasan_set_track+0x25/0x30 [ 91.836744] kasan_save_free_info+0x2b/0x50 [ 91.837318] __kasan_slab_free+0x10a/0x190 [ 91.837895] kmem_cache_free+0x10d/0x4d0 [ 91.838443] rcu_core+0x8c8/0x2860 [ 91.839003] __do_softirq+0x1b7/0x7d4 [ 91.839522] [ 91.839774] Last potentially related work creation: [ 91.840403] kasan_save_stack+0x22/0x50 [ 91.840943] __kasan_record_aux_stack+0x8e/0xa0 [ 91.841557] __call_rcu_common.constprop.0+0x6a/0xb90 [ 91.842258] remove_vma+0x139/0x170 [ 91.842748] do_vmi_align_munmap+0xd4a/0x11f0 [ 91.843351] do_vmi_munmap+0x1f1/0x2b0 [ 91.843890] __vm_munmap+0x138/0x3a0 [ 91.844393] __x64_sys_munmap+0x59/0x80 [ 91.844927] do_syscall_64+0x3f/0x90 [ 91.845439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 91.846130] [ 91.846365] The buggy address belongs to the object at ffff88800fe390e8 [ 91.846365] which belongs to the cache vm_area_struct of size 168 [ 91.847983] The buggy address is located 88 bytes inside of [ 91.847983] freed 168-byte region [ffff88800fe390e8, ffff88800fe39190) [ 91.849500] [ 91.849733] The buggy address belongs to the physical page: [ 91.850451] page:0000000010382b48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe39 [ 91.851637] memcg:ffff88800d6dd301 [ 91.852100] flags: 0x100000000000200(slab|node=0|zone=1) [ 91.852797] page_type: 0xffffffff() [ 91.853287] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 91.854282] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6dd301 [ 91.855268] page dumped because: kasan: bad access detected [ 91.856023] [ 91.856258] Memory state around the buggy address: [ 91.856899] ffff88800fe39000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 91.857827] ffff88800fe39080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 91.858762] >ffff88800fe39100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 91.859705] ^ [ 91.860396] ffff88800fe39180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 91.861330] ffff88800fe39200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 91.862258] ================================================================== [ 91.863304] Disabling lock debugging due to kernel taint [ 94.111567] BUG: Bad rss-counter state mm:0000000067db4a13 type:MM_FILEPAGES val:33 [ 94.112742] BUG: Bad rss-counter state mm:0000000067db4a13 type:MM_ANONPAGES val:22 [ 94.561559] BUG: Bad rss-counter state mm:000000006cc9aa28 type:MM_FILEPAGES val:33 [ 94.563492] BUG: Bad rss-counter state mm:000000006cc9aa28 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7538' (ECDSA) to the list of known hosts. 2023/06/20 06:02:32 fuzzer started 2023/06/20 06:02:32 dialing manager at localhost:44161 2023/06/20 06:02:32 checking machine... 2023/06/20 06:02:32 checking revisions... [ 95.342704] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:02:32 testing simple program... [ 95.391854] cgroup: Unknown subsys name 'net' [ 95.444298] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:01:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff856528e0 RCX=0000000000000000 RDX=1ffffffff0aca531 RSI=ffffffff814c842f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800f57f4d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f732d76c163 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000000014 RIP=ffffffff814c844b RFL=00000246 [---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 00007f732d279900 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=00007f732d830618 CR3=000000000e2ae000 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=563412feff00545000000000000080fe 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=00007f77cfac1b50 CR3=0000000009a9a000 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=585b79bd52d398abf549f8c5cd968c99 XMM02=ec2efd57dc4c00df00000000001285d8 XMM03=e517d80bb235e45100000000001286a8 XMM04=85a7c67b0dc700e700000000000ae988 XMM05=6a603cb884712298000000000013d568 XMM06=00c3ffa147b8d857000000000013c608 XMM07=e042d86d42eb936e000000000012cf98 XMM08=e517d80bb235e45100000000001286a8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000