syzkaller login: [ 38.863514] BUG: Bad rss-counter state mm:000000000e6a7f1c type:MM_FILEPAGES val:33 [ 38.864570] BUG: Bad rss-counter state mm:000000000e6a7f1c type:MM_ANONPAGES val:22 [ 39.043223] ================================================================== [ 39.044195] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.045332] Read of size 8 at addr ffff88800dd9aa50 by task sshd/219 [ 39.046345] [ 39.046629] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.047770] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.049033] Call Trace: [ 39.049446] [ 39.049756] dump_stack_lvl+0x91/0xf0 [ 39.050282] print_report+0xcc/0x620 [ 39.050799] ? __virt_addr_valid+0x102/0x340 [ 39.051398] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.052057] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.052720] kasan_report+0xbe/0xf0 [ 39.053230] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.053894] vma_interval_tree_remove+0xc75/0xec0 [ 39.054544] vma_prepare+0xc54/0x11a0 [ 39.055088] __split_vma+0x5af/0x950 [ 39.055716] ? __pfx___split_vma+0x10/0x10 [ 39.056432] ? find_held_lock+0x2c/0x110 [ 39.057155] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.057921] ? lock_is_held_type+0x9f/0x120 [ 39.058577] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.059240] ? mtree_range_walk+0x632/0x900 [ 39.059833] ? mas_walk+0x5c7/0x7c0 [ 39.060344] do_vmi_munmap+0x1f1/0x2b0 [ 39.060874] mmap_region+0x1f9/0x2660 [ 39.061391] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.061939] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.062720] ? __pfx_lock_acquire+0x10/0x10 [ 39.063298] ? __pfx_mmap_region+0x10/0x10 [ 39.063862] ? security_mmap_addr+0x7d/0xa0 [ 39.064431] ? get_unmapped_area+0x1f5/0x3f0 [ 39.065021] do_mmap+0x854/0xf00 [ 39.065489] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.066012] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.066614] ksys_mmap_pgoff+0x3af/0x500 [ 39.067239] do_syscall_64+0x3f/0x90 [ 39.067875] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.068684] RIP: 0033:0x7f0ad0e61d82 [ 39.069180] 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 [ 39.071494] RSP: 002b:00007ffc123dc9e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.072522] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ad0e61d82 [ 39.073431] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ad029b000 [ 39.074337] RBP: 00007f0ad029b000 R08: 0000000000000009 R09: 0000000000001000 [ 39.075263] R10: 0000000000000812 R11: 0000000000000206 R12: 00005593f250cec0 [ 39.076178] R13: 00007ffc123dca00 R14: 00007ffc123dca30 R15: 00007ffc123dcd90 [ 39.077095] [ 39.077413] [ 39.077659] Allocated by task 212: [ 39.078130] kasan_save_stack+0x22/0x50 [ 39.078669] kasan_set_track+0x25/0x30 [ 39.079218] __kasan_slab_alloc+0x59/0x70 [ 39.079825] kmem_cache_alloc+0x16b/0x370 [ 39.080392] vm_area_dup+0x20/0x160 [ 39.080885] __split_vma+0x170/0x950 [ 39.081394] split_vma+0xc6/0x110 [ 39.081876] mprotect_fixup+0x8d2/0xb30 [ 39.082421] do_mprotect_pkey+0x87e/0xd40 [ 39.082990] __x64_sys_mprotect+0x78/0xc0 [ 39.083597] do_syscall_64+0x3f/0x90 [ 39.084188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.085062] [ 39.085349] Freed by task 212: [ 39.085875] kasan_save_stack+0x22/0x50 [ 39.086560] kasan_set_track+0x25/0x30 [ 39.087173] kasan_save_free_info+0x2b/0x50 [ 39.087785] __kasan_slab_free+0x10a/0x190 [ 39.088364] kmem_cache_free+0x10d/0x4d0 [ 39.088911] rcu_core+0x8c8/0x2860 [ 39.089394] __do_softirq+0x1b7/0x7d4 [ 39.089911] [ 39.090142] Last potentially related work creation: [ 39.090785] kasan_save_stack+0x22/0x50 [ 39.091342] __kasan_record_aux_stack+0x8e/0xa0 [ 39.091992] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.092679] remove_vma+0x139/0x170 [ 39.093175] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.093769] do_vmi_munmap+0x1f1/0x2b0 [ 39.094296] __vm_munmap+0x138/0x3a0 [ 39.094801] __x64_sys_munmap+0x59/0x80 [ 39.095355] do_syscall_64+0x3f/0x90 [ 39.095865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.096557] [ 39.096786] The buggy address belongs to the object at ffff88800dd9a9f8 [ 39.096786] which belongs to the cache vm_area_struct of size 168 [ 39.098747] The buggy address is located 88 bytes inside of [ 39.098747] freed 168-byte region [ffff88800dd9a9f8, ffff88800dd9aaa0) [ 39.100353] [ 39.100588] The buggy address belongs to the physical page: [ 39.101300] page:0000000058d07900 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd9a [ 39.102460] memcg:ffff88800eb2b201 [ 39.102915] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.103667] page_type: 0xffffffff() [ 39.104155] raw: 0100000000000200 ffff8880087a0c80 ffffea000038a480 dead000000000005 [ 39.105155] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb2b201 [ 39.106141] page dumped because: kasan: bad access detected [ 39.106842] [ 39.107086] Memory state around the buggy address: [ 39.107712] ffff88800dd9a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.108641] ffff88800dd9a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 39.109785] >ffff88800dd9aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.110719] ^ [ 39.111486] ffff88800dd9aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.112416] ffff88800dd9ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.113330] ================================================================== [ 39.114461] Disabling lock debugging due to kernel taint [ 41.664236] BUG: Bad rss-counter state mm:00000000bbb00421 type:MM_FILEPAGES val:33 [ 41.665266] BUG: Bad rss-counter state mm:00000000bbb00421 type:MM_ANONPAGES val:22 [ 42.078517] BUG: Bad rss-counter state mm:00000000d8e033be type:MM_FILEPAGES val:33 [ 42.079574] BUG: Bad rss-counter state mm:00000000d8e033be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12811' (ECDSA) to the list of known hosts. 2023/06/21 08:00:17 fuzzer started 2023/06/21 08:00:17 dialing manager at localhost:36067 2023/06/21 08:00:17 checking machine... 2023/06/21 08:00:17 checking revisions... [ 42.853679] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:00:17 testing simple program... [ 42.907697] cgroup: Unknown subsys name 'net' [ 42.950103] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:00:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f27d64f96c3 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff8880199a7a18 RSP=ffff8880199a7990 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880199a7a88 R13=0000000000000000 R14=ffff8880102f3680 R15=ffff88800b5997c0 RIP=ffffffff811fc7bf RFL=00000286 [--S--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 00007f27d6016900 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=00007f0b471e2260 CR3=0000000019848000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff810a48a0 RBX=000000000000ddfe RCX=0000000000000000 RDX=ffff88801469b680 RSI=ffffffff813c925d RDI=ffffffff85497f20 RBP=0000000000000000 RSP=ffff88806cf09e98 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=00000009c5b9e500 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff810a48a4 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff6dfae1900 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=00007ff6dff0a020 CR3=0000000016d3c000 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=000056231cd33d400000000000000000 XMM02=000056231cd33d80000056231cd33c20 XMM03=000056231cd33f40000056231cd34150 XMM04=000056231cd33da0000056231cd34250 XMM05=0000000000000000000056231cd33ca0 XMM06=000056231cd33c00000056231cd34210 XMM07=000056231cd33cc0000056231cd33e80 XMM08=000056231cd343d00000000000000000 XMM09=00000000ffffffffff00000000ffffff XMM10=00000000000000000000000000202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000