Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.165933] BUG: Bad rss-counter state mm:0000000000506d68 type:MM_FILEPAGES val:33 [ 31.167104] BUG: Bad rss-counter state mm:0000000000506d68 type:MM_ANONPAGES val:22 [ 31.314760] ================================================================== [ 31.315869] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.317221] Read of size 8 at addr ffff88800e5b8228 by task sshd/222 [ 31.318051] [ 31.318262] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.319089] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.320048] Call Trace: [ 31.320360] [ 31.320642] dump_stack_lvl+0x91/0xf0 [ 31.321121] print_report+0xcc/0x620 [ 31.321598] ? __virt_addr_valid+0x102/0x340 [ 31.322119] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.322716] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.323300] kasan_report+0xbe/0xf0 [ 31.323794] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.324393] vma_interval_tree_remove+0xc75/0xec0 [ 31.324985] vma_prepare+0xc54/0x11a0 [ 31.325460] __split_vma+0x5af/0x950 [ 31.325918] ? __pfx___split_vma+0x10/0x10 [ 31.326464] ? find_held_lock+0x2c/0x110 [ 31.326991] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.327578] ? lock_is_held_type+0x9f/0x120 [ 31.328264] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.329080] ? mtree_range_walk+0x632/0x900 [ 31.329692] ? mas_walk+0x5c7/0x7c0 [ 31.330172] do_vmi_munmap+0x1f1/0x2b0 [ 31.330694] mmap_region+0x1f9/0x2660 [ 31.331176] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.331702] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.332428] ? __pfx_lock_acquire+0x10/0x10 [ 31.332973] ? __pfx_mmap_region+0x10/0x10 [ 31.333536] ? security_mmap_addr+0x7d/0xa0 [ 31.334069] ? get_unmapped_area+0x1f5/0x3f0 [ 31.334639] do_mmap+0x854/0xf00 [ 31.335076] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.335588] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.336157] ksys_mmap_pgoff+0x3af/0x500 [ 31.336687] do_syscall_64+0x3f/0x90 [ 31.337177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.337864] RIP: 0033:0x7f9441329d82 [ 31.338323] 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 [ 31.340476] RSP: 002b:00007ffd09cf6c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.341451] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9441329d82 [ 31.342312] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9440763000 [ 31.343166] RBP: 00007f9440763000 R08: 0000000000000009 R09: 0000000000001000 [ 31.344028] R10: 0000000000000812 R11: 0000000000000206 R12: 000056000255fd90 [ 31.344888] R13: 00007ffd09cf6cb0 R14: 00007ffd09cf6ce0 R15: 00007ffd09cf7040 [ 31.345785] [ 31.346080] [ 31.346291] Allocated by task 215: [ 31.346739] kasan_save_stack+0x22/0x50 [ 31.347249] kasan_set_track+0x25/0x30 [ 31.347767] __kasan_slab_alloc+0x59/0x70 [ 31.348298] kmem_cache_alloc+0x16b/0x370 [ 31.348870] vm_area_dup+0x20/0x160 [ 31.349319] __split_vma+0x170/0x950 [ 31.349823] split_vma+0xc6/0x110 [ 31.350270] mprotect_fixup+0x8d2/0xb30 [ 31.350809] do_mprotect_pkey+0x87e/0xd40 [ 31.351326] __x64_sys_mprotect+0x78/0xc0 [ 31.351898] do_syscall_64+0x3f/0x90 [ 31.352377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.353024] [ 31.353236] Freed by task 215: [ 31.353644] kasan_save_stack+0x22/0x50 [ 31.354151] kasan_set_track+0x25/0x30 [ 31.354682] kasan_save_free_info+0x2b/0x50 [ 31.355203] __kasan_slab_free+0x10a/0x190 [ 31.355757] kmem_cache_free+0x10d/0x4d0 [ 31.356267] rcu_core+0x8c8/0x2860 [ 31.356728] __do_softirq+0x1b7/0x7d4 [ 31.357227] [ 31.357459] Last potentially related work creation: [ 31.358050] kasan_save_stack+0x22/0x50 [ 31.358593] __kasan_record_aux_stack+0x8e/0xa0 [ 31.359170] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.359835] remove_vma+0x139/0x170 [ 31.360289] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.360888] do_vmi_munmap+0x1f1/0x2b0 [ 31.361383] __vm_munmap+0x138/0x3a0 [ 31.361857] __x64_sys_munmap+0x59/0x80 [ 31.362363] do_syscall_64+0x3f/0x90 [ 31.362848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.363512] [ 31.363733] Second to last potentially related work creation: [ 31.364426] kasan_save_stack+0x22/0x50 [ 31.364952] __kasan_record_aux_stack+0x8e/0xa0 [ 31.365550] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.366192] remove_vma+0x139/0x170 [ 31.366684] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.367247] do_vmi_munmap+0x1f1/0x2b0 [ 31.367761] mmap_region+0x1f9/0x2660 [ 31.368236] do_mmap+0x854/0xf00 [ 31.368688] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.369191] ksys_mmap_pgoff+0x7d/0x500 [ 31.369703] do_syscall_64+0x3f/0x90 [ 31.370173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.370852] [ 31.371066] The buggy address belongs to the object at ffff88800e5b81d0 [ 31.371066] which belongs to the cache vm_area_struct of size 168 [ 31.372569] The buggy address is located 88 bytes inside of [ 31.372569] freed 168-byte region [ffff88800e5b81d0, ffff88800e5b8278) [ 31.374021] [ 31.374235] The buggy address belongs to the physical page: [ 31.374927] page:0000000094a57ebd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5b8 [ 31.376021] memcg:ffff88800e5fe301 [ 31.376462] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.377178] page_type: 0xffffffff() [ 31.377638] raw: 0100000000000200 ffff88800879fc80 ffffea00003c01c0 dead000000000005 [ 31.378585] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5fe301 [ 31.379509] page dumped because: kasan: bad access detected [ 31.380170] [ 31.380397] Memory state around the buggy address: [ 31.381002] ffff88800e5b8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.381870] ffff88800e5b8180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.382756] >ffff88800e5b8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.383620] ^ [ 31.384179] ffff88800e5b8280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.385066] ffff88800e5b8300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.385938] ================================================================== [ 31.386984] Disabling lock debugging due to kernel taint [ 33.307740] BUG: Bad rss-counter state mm:000000009827dc76 type:MM_FILEPAGES val:33 [ 33.309015] BUG: Bad rss-counter state mm:000000009827dc76 type:MM_ANONPAGES val:22 [ 33.800580] BUG: Bad rss-counter state mm:000000008b9d051e type:MM_FILEPAGES val:33 [ 33.801778] BUG: Bad rss-counter state mm:000000008b9d051e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47809' (ECDSA) to the list of known hosts. 2023/06/19 21:58:26 fuzzer started 2023/06/19 21:58:26 dialing manager at localhost:44161 2023/06/19 21:58:26 checking machine... 2023/06/19 21:58:26 checking revisions... [ 34.533581] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:58:26 testing simple program... [ 34.582855] cgroup: Unknown subsys name 'net' [ 34.619910] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:58:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c136d RSI=ffffffff84531da7 RDI=ffff88806ce09b68 RBP=0000000000000006 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801375e8d0 RIP=ffffffff813ad46e RFL=00000212 [----A--] 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 0000000000000000 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=00007ffee8f63638 CR3=000000000945e000 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=2036323a38353a3132203931206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a38353a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100197665f RBX=ffff88800cbb32c8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800cbb32f8 RBP=ffff88801956a940 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88801956ef40 R14=ffffffff818d9dc6 R15=ffff88800da0e900 RIP=ffffffff8184636c 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 00007f4d8e6e0900 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=00007f4d8ec97618 CR3=000000000eaec000 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=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