syzkaller login: [ 30.777176] BUG: Bad rss-counter state mm:0000000066ee7db0 type:MM_FILEPAGES val:33 [ 30.778393] BUG: Bad rss-counter state mm:0000000066ee7db0 type:MM_ANONPAGES val:22 [ 30.927978] ================================================================== [ 30.929087] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.930309] Read of size 8 at addr ffff88800e13b058 by task sshd/220 [ 30.931287] [ 30.931545] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.932568] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.933774] Call Trace: [ 30.934155] [ 30.934493] dump_stack_lvl+0x91/0xf0 [ 30.935077] print_report+0xcc/0x620 [ 30.935653] ? __virt_addr_valid+0x102/0x340 [ 30.936305] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.937043] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.937810] kasan_report+0xbe/0xf0 [ 30.938423] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.939211] vma_interval_tree_remove+0xc75/0xec0 [ 30.939980] vma_prepare+0xc54/0x11a0 [ 30.940607] __split_vma+0x5af/0x950 [ 30.941204] ? __pfx___split_vma+0x10/0x10 [ 30.941897] ? find_held_lock+0x2c/0x110 [ 30.942558] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.943281] ? lock_is_held_type+0x9f/0x120 [ 30.943975] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.944751] ? mtree_range_walk+0x632/0x900 [ 30.945466] ? mas_walk+0x5c7/0x7c0 [ 30.946069] do_vmi_munmap+0x1f1/0x2b0 [ 30.946700] mmap_region+0x1f9/0x2660 [ 30.947306] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.947965] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.948883] ? __pfx_lock_acquire+0x10/0x10 [ 30.949579] ? __pfx_mmap_region+0x10/0x10 [ 30.950268] ? security_mmap_addr+0x7d/0xa0 [ 30.950954] ? get_unmapped_area+0x1f5/0x3f0 [ 30.951661] do_mmap+0x854/0xf00 [ 30.952212] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.952852] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.953592] ksys_mmap_pgoff+0x3af/0x500 [ 30.954252] do_syscall_64+0x3f/0x90 [ 30.954856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.955684] RIP: 0033:0x7fae7341dd82 [ 30.956263] 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 [ 30.959022] RSP: 002b:00007ffcf4054418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.960186] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fae7341dd82 [ 30.961287] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fae72857000 [ 30.962387] RBP: 00007fae72857000 R08: 0000000000000009 R09: 0000000000001000 [ 30.963474] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d319c6d90 [ 30.964576] R13: 00007ffcf4054430 R14: 00007ffcf4054460 R15: 00007ffcf40547c0 [ 30.965699] [ 30.966077] [ 30.966354] Allocated by task 213: [ 30.966901] kasan_save_stack+0x22/0x50 [ 30.967548] kasan_set_track+0x25/0x30 [ 30.968181] __kasan_slab_alloc+0x59/0x70 [ 30.968841] kmem_cache_alloc+0x16b/0x370 [ 30.969519] vm_area_dup+0x20/0x160 [ 30.970098] __split_vma+0x170/0x950 [ 30.970700] split_vma+0xc6/0x110 [ 30.971263] mprotect_fixup+0x8d2/0xb30 [ 30.971979] do_mprotect_pkey+0x87e/0xd40 [ 30.972636] __x64_sys_mprotect+0x78/0xc0 [ 30.973289] do_syscall_64+0x3f/0x90 [ 30.973899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.974731] [ 30.975002] Freed by task 19: [ 30.975486] kasan_save_stack+0x22/0x50 [ 30.976135] kasan_set_track+0x25/0x30 [ 30.976767] kasan_save_free_info+0x2b/0x50 [ 30.977470] __kasan_slab_free+0x10a/0x190 [ 30.978153] kmem_cache_free+0x10d/0x4d0 [ 30.978801] rcu_core+0x8c8/0x2860 [ 30.979366] __do_softirq+0x1b7/0x7d4 [ 30.979976] [ 30.980254] Last potentially related work creation: [ 30.981018] kasan_save_stack+0x22/0x50 [ 30.981674] __kasan_record_aux_stack+0x8e/0xa0 [ 30.982403] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.983225] remove_vma+0x139/0x170 [ 30.983798] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.984506] do_vmi_munmap+0x1f1/0x2b0 [ 30.985130] __vm_munmap+0x138/0x3a0 [ 30.985745] __x64_sys_munmap+0x59/0x80 [ 30.986375] do_syscall_64+0x3f/0x90 [ 30.986993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.987826] [ 30.988092] The buggy address belongs to the object at ffff88800e13b000 [ 30.988092] which belongs to the cache vm_area_struct of size 168 [ 30.989994] The buggy address is located 88 bytes inside of [ 30.989994] freed 168-byte region [ffff88800e13b000, ffff88800e13b0a8) [ 30.991804] [ 30.992078] The buggy address belongs to the physical page: [ 30.992924] page:000000000f5e3238 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe13b [ 30.994321] memcg:ffff88800f27d401 [ 30.994871] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.995706] page_type: 0xffffffff() [ 30.996277] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ae5c0 dead000000000002 [ 30.997487] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f27d401 [ 30.998660] page dumped because: kasan: bad access detected [ 30.999514] [ 30.999782] Memory state around the buggy address: [ 31.000524] ffff88800e13af00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.001628] ffff88800e13af80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.002732] >ffff88800e13b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.003832] ^ [ 31.004773] ffff88800e13b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.005881] ffff88800e13b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.006981] ================================================================== [ 31.008205] Disabling lock debugging due to kernel taint [ 32.928272] BUG: Bad rss-counter state mm:00000000b377092c type:MM_FILEPAGES val:33 [ 32.929495] BUG: Bad rss-counter state mm:00000000b377092c type:MM_ANONPAGES val:22 [ 33.468980] BUG: Bad rss-counter state mm:00000000a5cd61bb type:MM_FILEPAGES val:33 [ 33.470349] BUG: Bad rss-counter state mm:00000000a5cd61bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42343' (ECDSA) to the list of known hosts. 2023/06/20 22:58:56 fuzzer started 2023/06/20 22:58:56 dialing manager at localhost:36067 2023/06/20 22:58:56 checking machine... 2023/06/20 22:58:56 checking revisions... [ 34.155294] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:58:57 testing simple program... [ 34.208560] cgroup: Unknown subsys name 'net' [ 34.245347] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:58:56 Registers: info registers vcpu 0 RAX=1ffff110012bafdf RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff8880167b51c0 RSI=ffffffff81716940 RDI=ffff8880095d7ef8 RBP=00007ffddcda3ccc RSP=ffff8880147f7de8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff8880095d7e80 R13=00007ffddcda3ccc R14=0000000000000040 R15=ffff888019d0ae40 RIP=ffffffff81716950 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f21b38b2900 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=00007ffddcda3ccc CR3=0000000015d50000 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=00000000000000000000000000000000 XMM02=000000000000000000000000000000ff XMM03=b9d4c5a8324379398da5e71d41b13c5e XMM04=2b2922ca65b0f28aa24d1b8fa7ce96d3 XMM05=000000000000000000000000000000ff XMM06=2b2922a8324379398d4d1b1d41b13c5e XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007fb309792000 CR3=000000000d98e000 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=81af08d608916a88fc4381e038d6300d XMM02=000000000011a250ec2efd57dc4c00df XMM03=0000000000121b98203cf4dfa4d1bd57 XMM04=411a886c7e4268ac00000000000ae988 XMM05=f42301079d8e26cc0000000000131c78 XMM06=4fda316b135da52b0000000000131900 XMM07=e042d86d42eb936e0000000000121e18 XMM08=203cf4dfa4d1bd57000000000011a2b0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000