syzkaller login: [ 38.880444] BUG: Bad rss-counter state mm:00000000b9dbeb15 type:MM_FILEPAGES val:33 [ 38.881639] BUG: Bad rss-counter state mm:00000000b9dbeb15 type:MM_ANONPAGES val:22 [ 38.923441] ================================================================== [ 38.924625] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.925694] Read of size 8 at addr ffff888019f65c20 by task sshd/219 [ 38.926640] [ 38.926884] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.927934] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.929030] Call Trace: [ 38.929385] [ 38.929703] dump_stack_lvl+0x91/0xf0 [ 38.930276] print_report+0xcc/0x620 [ 38.930765] ? __virt_addr_valid+0x102/0x340 [ 38.931319] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.931938] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.932556] kasan_report+0xbe/0xf0 [ 38.933029] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.933649] vma_interval_tree_remove+0xc75/0xec0 [ 38.934261] vma_prepare+0xc54/0x11a0 [ 38.934741] __split_vma+0x5af/0x950 [ 38.935217] ? __pfx___split_vma+0x10/0x10 [ 38.935742] ? find_held_lock+0x2c/0x110 [ 38.936265] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.936830] ? lock_is_held_type+0x9f/0x120 [ 38.937373] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.937988] ? mtree_range_walk+0x632/0x900 [ 38.938553] ? mas_walk+0x5c7/0x7c0 [ 38.939035] do_vmi_munmap+0x1f1/0x2b0 [ 38.939525] mmap_region+0x1f9/0x2660 [ 38.940006] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.940521] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.941235] ? __pfx_lock_acquire+0x10/0x10 [ 38.941769] ? __pfx_mmap_region+0x10/0x10 [ 38.942318] ? security_mmap_addr+0x7d/0xa0 [ 38.942849] ? get_unmapped_area+0x1f5/0x3f0 [ 38.943405] do_mmap+0x854/0xf00 [ 38.943846] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.944341] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.944904] ksys_mmap_pgoff+0x3af/0x500 [ 38.945412] do_syscall_64+0x3f/0x90 [ 38.945902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.946550] RIP: 0033:0x7ff5f242fd82 [ 38.947010] 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 [ 38.949118] RSP: 002b:00007ffe3be01628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.950036] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff5f242fd82 [ 38.950880] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff5f1869000 [ 38.951724] RBP: 00007ff5f1869000 R08: 0000000000000009 R09: 0000000000001000 [ 38.952568] R10: 0000000000000812 R11: 0000000000000206 R12: 000056518cb6bec0 [ 38.953409] R13: 00007ffe3be01640 R14: 00007ffe3be01670 R15: 00007ffe3be019d0 [ 38.954271] [ 38.954567] [ 38.954783] Allocated by task 212: [ 38.955218] kasan_save_stack+0x22/0x50 [ 38.955718] kasan_set_track+0x25/0x30 [ 38.956209] __kasan_slab_alloc+0x59/0x70 [ 38.956732] kmem_cache_alloc+0x16b/0x370 [ 38.957253] vm_area_dup+0x20/0x160 [ 38.957703] __split_vma+0x170/0x950 [ 38.958200] split_vma+0xc6/0x110 [ 38.958640] mprotect_fixup+0x8d2/0xb30 [ 38.959136] do_mprotect_pkey+0x87e/0xd40 [ 38.959670] __x64_sys_mprotect+0x78/0xc0 [ 38.960194] do_syscall_64+0x3f/0x90 [ 38.960667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.961308] [ 38.961522] Freed by task 212: [ 38.961938] kasan_save_stack+0x22/0x50 [ 38.962460] kasan_set_track+0x25/0x30 [ 38.962960] kasan_save_free_info+0x2b/0x50 [ 38.963495] __kasan_slab_free+0x10a/0x190 [ 38.964026] kmem_cache_free+0x10d/0x4d0 [ 38.964551] rcu_core+0x8c8/0x2860 [ 38.964994] __do_softirq+0x1b7/0x7d4 [ 38.965496] [ 38.965721] Last potentially related work creation: [ 38.966306] kasan_save_stack+0x22/0x50 [ 38.966860] __kasan_record_aux_stack+0x8e/0xa0 [ 38.967496] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.968211] remove_vma+0x139/0x170 [ 38.968753] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.969371] do_vmi_munmap+0x1f1/0x2b0 [ 38.969930] __vm_munmap+0x138/0x3a0 [ 38.970444] __x64_sys_munmap+0x59/0x80 [ 38.970992] do_syscall_64+0x3f/0x90 [ 38.971513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.972227] [ 38.972463] The buggy address belongs to the object at ffff888019f65bc8 [ 38.972463] which belongs to the cache vm_area_struct of size 168 [ 38.974094] The buggy address is located 88 bytes inside of [ 38.974094] freed 168-byte region [ffff888019f65bc8, ffff888019f65c70) [ 38.975724] [ 38.975975] The buggy address belongs to the physical page: [ 38.976732] page:00000000c2838bfe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f65 [ 38.977967] memcg:ffff888016a20f01 [ 38.978446] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.979185] page_type: 0xffffffff() [ 38.979666] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b3700 dead000000000007 [ 38.980644] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a20f01 [ 38.981603] page dumped because: kasan: bad access detected [ 38.982315] [ 38.982544] Memory state around the buggy address: [ 38.983154] ffff888019f65b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.984046] ffff888019f65b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.984946] >ffff888019f65c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.985856] ^ [ 38.986424] ffff888019f65c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.987335] ffff888019f65d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.988241] ================================================================== [ 38.989285] Disabling lock debugging due to kernel taint [ 41.259690] BUG: Bad rss-counter state mm:00000000a9d75143 type:MM_FILEPAGES val:33 [ 41.261019] BUG: Bad rss-counter state mm:00000000a9d75143 type:MM_ANONPAGES val:22 [ 41.738209] BUG: Bad rss-counter state mm:00000000a4c8d2c3 type:MM_FILEPAGES val:33 [ 41.739663] BUG: Bad rss-counter state mm:00000000a4c8d2c3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17798' (ECDSA) to the list of known hosts. 2023/06/21 04:21:12 fuzzer started 2023/06/21 04:21:12 dialing manager at localhost:36067 2023/06/21 04:21:12 checking machine... 2023/06/21 04:21:12 checking revisions... [ 42.455856] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:21:12 testing simple program... [ 42.506434] cgroup: Unknown subsys name 'net' [ 42.592578] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:21:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81f4d61a RDX=ffff888018c0d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888017eefc38 RSP=ffff888017eefa50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=ffff888017eefc3c R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff814c027c 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 00007f5da2502900 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=00007f5da2ab9618 CR3=000000000ea7c000 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=00007fe0e73ba048 CR3=000000000b370000 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=a7e953b6bbe0ab8c044fd004a9a51c65 XMM02=000000000011b0e0eff9b2d0a8fce9cb XMM03=000000000011b1b02c67c8bc2e329bc3 XMM04=f6e543dc4949936700000000000ae988 XMM05=dfcdbad4f1609c370000000000131690 XMM06=c32c70907936bbb70000000000130868 XMM07=e042d86d42eb936e0000000000121dc8 XMM08=d5ebe0bab689b27f000000000011b1b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000