syzkaller login: [ 39.190806] BUG: Bad rss-counter state mm:00000000162283e7 type:MM_FILEPAGES val:33 [ 39.191823] BUG: Bad rss-counter state mm:00000000162283e7 type:MM_ANONPAGES val:22 [ 39.363755] ================================================================== [ 39.364817] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.366024] Read of size 8 at addr ffff8880147d1c20 by task sshd/220 [ 39.366861] [ 39.367081] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.367937] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.368907] Call Trace: [ 39.369226] [ 39.369510] dump_stack_lvl+0x91/0xf0 [ 39.369995] print_report+0xcc/0x620 [ 39.370498] ? __virt_addr_valid+0x102/0x340 [ 39.371062] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.371676] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.372288] kasan_report+0xbe/0xf0 [ 39.372766] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.373387] vma_interval_tree_remove+0xc75/0xec0 [ 39.373988] vma_prepare+0xc54/0x11a0 [ 39.374464] __split_vma+0x5af/0x950 [ 39.374953] ? __pfx___split_vma+0x10/0x10 [ 39.375475] ? find_held_lock+0x2c/0x110 [ 39.375999] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.376565] ? lock_is_held_type+0x9f/0x120 [ 39.377100] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.377705] ? mtree_range_walk+0x632/0x900 [ 39.378251] ? mas_walk+0x5c7/0x7c0 [ 39.378757] do_vmi_munmap+0x1f1/0x2b0 [ 39.379258] mmap_region+0x1f9/0x2660 [ 39.379751] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.380281] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.381016] ? __pfx_lock_acquire+0x10/0x10 [ 39.381570] ? __pfx_mmap_region+0x10/0x10 [ 39.382119] ? security_mmap_addr+0x7d/0xa0 [ 39.382656] ? get_unmapped_area+0x1f5/0x3f0 [ 39.383251] do_mmap+0x854/0xf00 [ 39.383713] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.384228] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.384803] ksys_mmap_pgoff+0x3af/0x500 [ 39.385336] do_syscall_64+0x3f/0x90 [ 39.385822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.386481] RIP: 0033:0x7f7a343c0d82 [ 39.386964] 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 [ 39.389145] RSP: 002b:00007ffca429d9a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.390078] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a343c0d82 [ 39.390960] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a337fa000 [ 39.391826] RBP: 00007f7a337fa000 R08: 0000000000000009 R09: 0000000000001000 [ 39.392718] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e742e2b20 [ 39.393580] R13: 00007ffca429d9c0 R14: 00007ffca429d9f0 R15: 00007ffca429dd50 [ 39.394457] [ 39.394777] [ 39.394995] Allocated by task 213: [ 39.395431] kasan_save_stack+0x22/0x50 [ 39.395947] kasan_set_track+0x25/0x30 [ 39.396450] __kasan_slab_alloc+0x59/0x70 [ 39.396986] kmem_cache_alloc+0x16b/0x370 [ 39.397508] vm_area_dup+0x20/0x160 [ 39.397972] __split_vma+0x170/0x950 [ 39.398439] split_vma+0xc6/0x110 [ 39.398941] mprotect_fixup+0x8d2/0xb30 [ 39.399444] do_mprotect_pkey+0x87e/0xd40 [ 39.399974] __x64_sys_mprotect+0x78/0xc0 [ 39.400514] do_syscall_64+0x3f/0x90 [ 39.401002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.401660] [ 39.401878] Freed by task 213: [ 39.402278] kasan_save_stack+0x22/0x50 [ 39.402810] kasan_set_track+0x25/0x30 [ 39.403313] kasan_save_free_info+0x2b/0x50 [ 39.403861] __kasan_slab_free+0x10a/0x190 [ 39.404403] kmem_cache_free+0x10d/0x4d0 [ 39.404927] rcu_core+0x8c8/0x2860 [ 39.405380] __do_softirq+0x1b7/0x7d4 [ 39.405870] [ 39.406087] Last potentially related work creation: [ 39.406698] kasan_save_stack+0x22/0x50 [ 39.407214] __kasan_record_aux_stack+0x8e/0xa0 [ 39.407799] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.408446] remove_vma+0x139/0x170 [ 39.408898] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.409462] do_vmi_munmap+0x1f1/0x2b0 [ 39.409954] __vm_munmap+0x138/0x3a0 [ 39.410419] __x64_sys_munmap+0x59/0x80 [ 39.410934] do_syscall_64+0x3f/0x90 [ 39.411408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.412059] [ 39.412287] The buggy address belongs to the object at ffff8880147d1bc8 [ 39.412287] which belongs to the cache vm_area_struct of size 168 [ 39.413786] The buggy address is located 88 bytes inside of [ 39.413786] freed 168-byte region [ffff8880147d1bc8, ffff8880147d1c70) [ 39.415238] [ 39.415462] The buggy address belongs to the physical page: [ 39.416140] page:00000000dc52fb59 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147d1 [ 39.417264] memcg:ffff88800e1d8001 [ 39.417697] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.418349] page_type: 0xffffffff() [ 39.418818] raw: 0100000000000200 ffff88800879fc80 ffffea0000272080 dead000000000002 [ 39.419762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1d8001 [ 39.420681] page dumped because: kasan: bad access detected [ 39.421355] [ 39.421575] Memory state around the buggy address: [ 39.422154] ffff8880147d1b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.423034] ffff8880147d1b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.423913] >ffff8880147d1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.424785] ^ [ 39.425331] ffff8880147d1c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.426212] ffff8880147d1d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.427095] ================================================================== [ 39.428097] Disabling lock debugging due to kernel taint [ 41.649545] BUG: Bad rss-counter state mm:000000002d1d441a type:MM_FILEPAGES val:33 [ 41.650528] BUG: Bad rss-counter state mm:000000002d1d441a type:MM_ANONPAGES val:22 [ 42.014477] BUG: Bad rss-counter state mm:00000000d3280254 type:MM_FILEPAGES val:33 [ 42.015498] BUG: Bad rss-counter state mm:00000000d3280254 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54780' (ECDSA) to the list of known hosts. 2023/06/20 00:01:20 fuzzer started 2023/06/20 00:01:20 dialing manager at localhost:44161 2023/06/20 00:01:21 checking machine... 2023/06/20 00:01:21 checking revisions... [ 42.716970] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:01:21 testing simple program... [ 42.774884] cgroup: Unknown subsys name 'net' [ 42.866130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:01:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f7b9ef1b163 RCX=0000000000000000 RDX=ffff88800e128000 RSI=00007f7b9ef1b163 RDI=ffffffff856528e0 RBP=00007f7b9ef1b163 RSP=ffff888018dd73b0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888018dd74d8 R13=0000000000000000 R14=ffff88800e128000 R15=ffff88800df52e40 RIP=ffffffff814c83da 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 00007f7b9ea28900 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=00007f7b9efdf618 CR3=000000001a248000 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=00007f82a0e9e510 CR3=000000000d674000 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=617d5bc60974a1b9fd4d345664305d30 XMM02=2c67c8bc2e329bc3000000000011dc58 XMM03=fb795ef6d65770560000000000124618 XMM04=0229a0cfcaf150fd00000000000ae988 XMM05=19e9129bd510f2350000000000133ea0 XMM06=4fda316b135da52b0000000000133d28 XMM07=e042d86d42eb936e00000000001248f0 XMM08=d9d34edae5722d36000000000011dcb8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000