syzkaller login: [ 30.144941] BUG: Bad rss-counter state mm:00000000d04f4bdb type:MM_FILEPAGES val:33 [ 30.146515] BUG: Bad rss-counter state mm:00000000d04f4bdb type:MM_ANONPAGES val:22 [ 30.315603] ================================================================== [ 30.316588] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.317632] Read of size 8 at addr ffff8880166d14e0 by task sshd/219 [ 30.318563] [ 30.318811] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.319774] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.320894] Call Trace: [ 30.321275] [ 30.321603] dump_stack_lvl+0x91/0xf0 [ 30.322124] print_report+0xcc/0x620 [ 30.322641] ? __virt_addr_valid+0x102/0x340 [ 30.323227] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.323877] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.324533] kasan_report+0xbe/0xf0 [ 30.325040] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.325724] vma_interval_tree_remove+0xc75/0xec0 [ 30.326365] vma_prepare+0xc54/0x11a0 [ 30.326869] __split_vma+0x5af/0x950 [ 30.327370] ? __pfx___split_vma+0x10/0x10 [ 30.327930] ? find_held_lock+0x2c/0x110 [ 30.328483] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.329083] ? lock_is_held_type+0x9f/0x120 [ 30.329668] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.330308] ? mtree_range_walk+0x632/0x900 [ 30.330895] ? mas_walk+0x5c7/0x7c0 [ 30.331400] do_vmi_munmap+0x1f1/0x2b0 [ 30.331928] mmap_region+0x1f9/0x2660 [ 30.332449] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.332995] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.333757] ? __pfx_lock_acquire+0x10/0x10 [ 30.334322] ? __pfx_mmap_region+0x10/0x10 [ 30.334888] ? security_mmap_addr+0x7d/0xa0 [ 30.335454] ? get_unmapped_area+0x1f5/0x3f0 [ 30.336042] do_mmap+0x854/0xf00 [ 30.336502] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.337030] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.337643] ksys_mmap_pgoff+0x3af/0x500 [ 30.338185] do_syscall_64+0x3f/0x90 [ 30.338698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.339394] RIP: 0033:0x7f627cb51d82 [ 30.339884] 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 [ 30.342146] RSP: 002b:00007ffd50edde38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.343109] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f627cb51d82 [ 30.344008] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f627bf8b000 [ 30.344943] RBP: 00007f627bf8b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.345897] R10: 0000000000000812 R11: 0000000000000206 R12: 000056071f4c7980 [ 30.346827] R13: 00007ffd50edde50 R14: 00007ffd50edde80 R15: 00007ffd50ede1e0 [ 30.347769] [ 30.348094] [ 30.348335] Allocated by task 212: [ 30.348814] kasan_save_stack+0x22/0x50 [ 30.349382] kasan_set_track+0x25/0x30 [ 30.349932] __kasan_slab_alloc+0x59/0x70 [ 30.350505] kmem_cache_alloc+0x16b/0x370 [ 30.351074] vm_area_dup+0x20/0x160 [ 30.351580] __split_vma+0x170/0x950 [ 30.352094] split_vma+0xc6/0x110 [ 30.352577] mprotect_fixup+0x8d2/0xb30 [ 30.353130] do_mprotect_pkey+0x87e/0xd40 [ 30.353704] __x64_sys_mprotect+0x78/0xc0 [ 30.354266] do_syscall_64+0x3f/0x90 [ 30.354787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.355477] [ 30.355706] Freed by task 209: [ 30.356123] kasan_save_stack+0x22/0x50 [ 30.356663] kasan_set_track+0x25/0x30 [ 30.357192] kasan_save_free_info+0x2b/0x50 [ 30.357788] __kasan_slab_free+0x10a/0x190 [ 30.358361] kmem_cache_free+0x10d/0x4d0 [ 30.358899] rcu_core+0x8c8/0x2860 [ 30.359366] __do_softirq+0x1b7/0x7d4 [ 30.359881] [ 30.360112] Last potentially related work creation: [ 30.360731] kasan_save_stack+0x22/0x50 [ 30.361282] __kasan_record_aux_stack+0x8e/0xa0 [ 30.361916] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.362616] remove_vma+0x139/0x170 [ 30.363114] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.363726] do_vmi_munmap+0x1f1/0x2b0 [ 30.364241] __vm_munmap+0x138/0x3a0 [ 30.364741] __x64_sys_munmap+0x59/0x80 [ 30.365268] do_syscall_64+0x3f/0x90 [ 30.365808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.366514] [ 30.366746] The buggy address belongs to the object at ffff8880166d1488 [ 30.366746] which belongs to the cache vm_area_struct of size 168 [ 30.368312] The buggy address is located 88 bytes inside of [ 30.368312] freed 168-byte region [ffff8880166d1488, ffff8880166d1530) [ 30.369836] [ 30.370066] The buggy address belongs to the physical page: [ 30.370778] page:000000001d578f83 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166d1 [ 30.371950] memcg:ffff8880166c9201 [ 30.372407] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.373095] page_type: 0xffffffff() [ 30.373593] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b22c0 dead000000000008 [ 30.374569] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166c9201 [ 30.375540] page dumped because: kasan: bad access detected [ 30.376236] [ 30.376464] Memory state around the buggy address: [ 30.377089] ffff8880166d1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.378018] ffff8880166d1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.378920] >ffff8880166d1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.379825] ^ [ 30.380629] ffff8880166d1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.381543] ffff8880166d1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.382450] ================================================================== [ 30.383514] Disabling lock debugging due to kernel taint [ 32.656850] BUG: Bad rss-counter state mm:000000000a27a35a type:MM_FILEPAGES val:33 [ 32.658033] BUG: Bad rss-counter state mm:000000000a27a35a type:MM_ANONPAGES val:22 [ 33.063274] BUG: Bad rss-counter state mm:000000004ce61da7 type:MM_FILEPAGES val:33 [ 33.064524] BUG: Bad rss-counter state mm:000000004ce61da7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55367' (ECDSA) to the list of known hosts. 2023/06/20 14:08:13 fuzzer started 2023/06/20 14:08:13 dialing manager at localhost:36067 2023/06/20 14:08:13 checking machine... 2023/06/20 14:08:13 checking revisions... [ 33.779846] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:08:13 testing simple program... [ 33.827107] cgroup: Unknown subsys name 'net' [ 33.890780] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:08:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea0000621f80 RCX=ffffffff816a9c07 RDX=ffff888014740000 RSI=0000000000000008 RDI=ffffea0000621f80 RBP=0000000000000000 RSP=ffff88801473fa50 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffffffff81b28f30 R14=0000000000800000 R15=0000000000062000 RIP=ffffffff8180fea8 RFL=00000293 [--S-A-C] 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 00007fd9b05d1900 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=00007fd9afa1d520 CR3=000000000ca60000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=255043ff6eee9d3f00000000000ae988 XMM05=c9a0e373d2a8ba280000000000133780 XMM06=806171799158d9670000000000132820 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000020 RBX=dffffc0000000000 RCX=ffffffff812e0694 RDX=0000000000000004 RSI=ffffffff84da7040 RDI=0000000000000000 RBP=ffffffff84da7040 RSP=ffff88800df57558 R8 =0000000000000001 R9 =ffffed1001f452ac R10=ffff88800fa29563 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800df57728 R15=ffff88800f2d1dc0 RIP=ffffffff814c0476 RFL=00000297 [--S-APC] 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 00007f3f9559f900 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=00007f3f95b56618 CR3=000000001c904000 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