syzkaller login: [ 38.678133] BUG: Bad rss-counter state mm:000000000f133a0d type:MM_FILEPAGES val:33 [ 38.680264] BUG: Bad rss-counter state mm:000000000f133a0d type:MM_ANONPAGES val:22 [ 38.848579] ================================================================== [ 38.849614] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.850664] Read of size 8 at addr ffff88800e6806b0 by task sshd/219 [ 38.851742] [ 38.851982] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.852933] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.854008] Call Trace: [ 38.854361] [ 38.854702] dump_stack_lvl+0x91/0xf0 [ 38.855251] print_report+0xcc/0x620 [ 38.855787] ? __virt_addr_valid+0x102/0x340 [ 38.856401] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.857084] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.857764] kasan_report+0xbe/0xf0 [ 38.858290] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.858995] vma_interval_tree_remove+0xc75/0xec0 [ 38.859664] vma_prepare+0xc54/0x11a0 [ 38.860195] __split_vma+0x5af/0x950 [ 38.860722] ? __pfx___split_vma+0x10/0x10 [ 38.861308] ? find_held_lock+0x2c/0x110 [ 38.861884] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.862510] ? lock_is_held_type+0x9f/0x120 [ 38.863114] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.863794] ? mtree_range_walk+0x632/0x900 [ 38.864409] ? mas_walk+0x5c7/0x7c0 [ 38.864941] do_vmi_munmap+0x1f1/0x2b0 [ 38.865497] mmap_region+0x1f9/0x2660 [ 38.866032] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.866623] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.867426] ? __pfx_lock_acquire+0x10/0x10 [ 38.868024] ? __pfx_mmap_region+0x10/0x10 [ 38.868623] ? security_mmap_addr+0x7d/0xa0 [ 38.869215] ? get_unmapped_area+0x1f5/0x3f0 [ 38.869826] do_mmap+0x854/0xf00 [ 38.870318] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.870888] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.871516] ksys_mmap_pgoff+0x3af/0x500 [ 38.872089] do_syscall_64+0x3f/0x90 [ 38.872644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.873343] RIP: 0033:0x7fab3e931d82 [ 38.873830] 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 [ 38.876269] RSP: 002b:00007ffcaae21808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.877205] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab3e931d82 [ 38.878082] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab3dd6b000 [ 38.878982] RBP: 00007fab3dd6b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.879863] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c62cd07ec0 [ 38.880745] R13: 00007ffcaae21820 R14: 00007ffcaae21850 R15: 00007ffcaae21bb0 [ 38.881636] [ 38.881939] [ 38.882165] Allocated by task 212: [ 38.882617] kasan_save_stack+0x22/0x50 [ 38.883166] kasan_set_track+0x25/0x30 [ 38.883705] __kasan_slab_alloc+0x59/0x70 [ 38.884272] kmem_cache_alloc+0x16b/0x370 [ 38.884845] vm_area_dup+0x20/0x160 [ 38.885348] __split_vma+0x170/0x950 [ 38.885859] split_vma+0xc6/0x110 [ 38.886321] mprotect_fixup+0x8d2/0xb30 [ 38.886876] do_mprotect_pkey+0x87e/0xd40 [ 38.887422] __x64_sys_mprotect+0x78/0xc0 [ 38.887975] do_syscall_64+0x3f/0x90 [ 38.888475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.889144] [ 38.889371] Freed by task 212: [ 38.889779] kasan_save_stack+0x22/0x50 [ 38.890302] kasan_set_track+0x25/0x30 [ 38.890829] kasan_save_free_info+0x2b/0x50 [ 38.891382] __kasan_slab_free+0x10a/0x190 [ 38.891937] kmem_cache_free+0x10d/0x4d0 [ 38.892543] rcu_core+0x8c8/0x2860 [ 38.893014] __do_softirq+0x1b7/0x7d4 [ 38.893514] [ 38.893742] Last potentially related work creation: [ 38.894350] kasan_save_stack+0x22/0x50 [ 38.894896] __kasan_record_aux_stack+0x8e/0xa0 [ 38.895494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.896176] remove_vma+0x139/0x170 [ 38.896648] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.897237] do_vmi_munmap+0x1f1/0x2b0 [ 38.897746] __vm_munmap+0x138/0x3a0 [ 38.898235] __x64_sys_munmap+0x59/0x80 [ 38.898760] do_syscall_64+0x3f/0x90 [ 38.899257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.899926] [ 38.900156] The buggy address belongs to the object at ffff88800e680658 [ 38.900156] which belongs to the cache vm_area_struct of size 168 [ 38.901699] The buggy address is located 88 bytes inside of [ 38.901699] freed 168-byte region [ffff88800e680658, ffff88800e680700) [ 38.903167] [ 38.903394] The buggy address belongs to the physical page: [ 38.904085] page:0000000021535047 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe680 [ 38.905208] memcg:ffff88800d97ee01 [ 38.905648] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.906320] page_type: 0xffffffff() [ 38.906804] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.907760] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d97ee01 [ 38.908703] page dumped because: kasan: bad access detected [ 38.909395] [ 38.909621] Memory state around the buggy address: [ 38.910223] ffff88800e680580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.911118] ffff88800e680600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.912017] >ffff88800e680680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.912929] ^ [ 38.913574] ffff88800e680700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.914561] ffff88800e680780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.915520] ================================================================== [ 38.916575] Disabling lock debugging due to kernel taint [ 40.866407] BUG: Bad rss-counter state mm:0000000025879529 type:MM_FILEPAGES val:33 [ 40.867561] BUG: Bad rss-counter state mm:0000000025879529 type:MM_ANONPAGES val:22 [ 41.300745] BUG: Bad rss-counter state mm:000000001d9dba00 type:MM_FILEPAGES val:33 [ 41.301524] BUG: Bad rss-counter state mm:000000001d9dba00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10708' (ECDSA) to the list of known hosts. 2023/06/21 06:46:06 fuzzer started 2023/06/21 06:46:06 dialing manager at localhost:36067 2023/06/21 06:46:06 checking machine... 2023/06/21 06:46:06 checking revisions... [ 42.029634] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:46:06 testing simple program... [ 42.077652] cgroup: Unknown subsys name 'net' [ 42.130667] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:46:06 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002cadf6b RSP=ffff88801656fb38 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff8182e272 R14=0000000000000180 R15=0000000000000000 RIP=ffffffff8135b979 RFL=00000002 [-------] 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 00007ff8ba70e900 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=00007ff8bacc5618 CR3=000000001470e000 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=ffff888008c04400 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=00007ff090f8d658 CR3=0000000013aa0000 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=c74e88860abe4cbf4d4cb990a2b38523 XMM02=000000000011b4a0ec2efd57dc4c00df XMM03=0000000000121e400105435eec972e47 XMM04=4e30655aba6503fc00000000000ae988 XMM05=dfcdbad4f1609c3700000000001319e0 XMM06=47b17ab2e631ef090000000000130bb8 XMM07=e042d86d42eb936e0000000000122118 XMM08=0105435eec972e47000000000011b500 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000