syzkaller login: [ 58.745412] BUG: Bad rss-counter state mm:000000008b524deb type:MM_FILEPAGES val:33 [ 58.746484] BUG: Bad rss-counter state mm:000000008b524deb type:MM_ANONPAGES val:22 [ 58.910801] ================================================================== [ 58.911762] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 58.912736] Read of size 8 at addr ffff88800d6a5310 by task sshd/220 [ 58.913542] [ 58.913858] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 58.914743] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 58.915735] Call Trace: [ 58.916084] [ 58.916372] dump_stack_lvl+0x91/0xf0 [ 58.916880] print_report+0xcc/0x620 [ 58.917389] ? __virt_addr_valid+0x102/0x340 [ 58.917941] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.918563] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.919194] kasan_report+0xbe/0xf0 [ 58.919688] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.920332] vma_interval_tree_remove+0xc75/0xec0 [ 58.920957] vma_prepare+0xc54/0x11a0 [ 58.921457] __split_vma+0x5af/0x950 [ 58.921945] ? __pfx___split_vma+0x10/0x10 [ 58.922493] ? find_held_lock+0x2c/0x110 [ 58.923034] do_vmi_align_munmap+0x2ba/0x11f0 [ 58.923630] ? lock_is_held_type+0x9f/0x120 [ 58.924226] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 58.924859] ? mtree_range_walk+0x632/0x900 [ 58.925432] ? mas_walk+0x5c7/0x7c0 [ 58.925933] do_vmi_munmap+0x1f1/0x2b0 [ 58.926444] mmap_region+0x1f9/0x2660 [ 58.926950] ? vm_mmap_pgoff+0x15c/0x3a0 [ 58.927485] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 58.928244] ? __pfx_lock_acquire+0x10/0x10 [ 58.928803] ? __pfx_mmap_region+0x10/0x10 [ 58.929373] ? security_mmap_addr+0x7d/0xa0 [ 58.929927] ? get_unmapped_area+0x1f5/0x3f0 [ 58.930498] do_mmap+0x854/0xf00 [ 58.930955] vm_mmap_pgoff+0x1a6/0x3a0 [ 58.931473] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 58.932083] ksys_mmap_pgoff+0x3af/0x500 [ 58.932609] do_syscall_64+0x3f/0x90 [ 58.933109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.933782] RIP: 0033:0x7f3895778d82 [ 58.934256] 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 [ 58.936523] RSP: 002b:00007fff60f0e808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 58.937480] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3895778d82 [ 58.938379] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3894bb2000 [ 58.939269] RBP: 00007f3894bb2000 R08: 0000000000000009 R09: 0000000000001000 [ 58.940174] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b70455ec0 [ 58.941059] R13: 00007fff60f0e820 R14: 00007fff60f0e850 R15: 00007fff60f0ebb0 [ 58.941971] [ 58.942274] [ 58.942498] Allocated by task 213: [ 58.942945] kasan_save_stack+0x22/0x50 [ 58.943476] kasan_set_track+0x25/0x30 [ 58.944015] __kasan_slab_alloc+0x59/0x70 [ 58.944564] kmem_cache_alloc+0x16b/0x370 [ 58.945109] vm_area_dup+0x20/0x160 [ 58.945583] __split_vma+0x170/0x950 [ 58.946070] split_vma+0xc6/0x110 [ 58.946527] mprotect_fixup+0x8d2/0xb30 [ 58.947056] do_mprotect_pkey+0x87e/0xd40 [ 58.947597] __x64_sys_mprotect+0x78/0xc0 [ 58.948157] do_syscall_64+0x3f/0x90 [ 58.948655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.949332] [ 58.949559] Freed by task 213: [ 58.949976] kasan_save_stack+0x22/0x50 [ 58.950500] kasan_set_track+0x25/0x30 [ 58.951021] kasan_save_free_info+0x2b/0x50 [ 58.951575] __kasan_slab_free+0x10a/0x190 [ 58.952151] kmem_cache_free+0x10d/0x4d0 [ 58.952682] rcu_core+0x8c8/0x2860 [ 58.953151] __do_softirq+0x1b7/0x7d4 [ 58.953655] [ 58.953877] Last potentially related work creation: [ 58.954491] kasan_save_stack+0x22/0x50 [ 58.955020] __kasan_record_aux_stack+0x8e/0xa0 [ 58.955618] __call_rcu_common.constprop.0+0x6a/0xb90 [ 58.956300] remove_vma+0x139/0x170 [ 58.956766] do_vmi_align_munmap+0xd4a/0x11f0 [ 58.957345] do_vmi_munmap+0x1f1/0x2b0 [ 58.957847] __vm_munmap+0x138/0x3a0 [ 58.958336] __x64_sys_munmap+0x59/0x80 [ 58.958853] do_syscall_64+0x3f/0x90 [ 58.959351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.960034] [ 58.960263] The buggy address belongs to the object at ffff88800d6a52b8 [ 58.960263] which belongs to the cache vm_area_struct of size 168 [ 58.961825] The buggy address is located 88 bytes inside of [ 58.961825] freed 168-byte region [ffff88800d6a52b8, ffff88800d6a5360) [ 58.963305] [ 58.963530] The buggy address belongs to the physical page: [ 58.964246] page:0000000083639fc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd6a5 [ 58.965414] memcg:ffff88800ee67901 [ 58.965861] flags: 0x100000000000200(slab|node=0|zone=1) [ 58.966534] page_type: 0xffffffff() [ 58.967002] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 58.967985] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee67901 [ 58.968945] page dumped because: kasan: bad access detected [ 58.969638] [ 58.969869] Memory state around the buggy address: [ 58.970478] ffff88800d6a5200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 58.971370] ffff88800d6a5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 58.972287] >ffff88800d6a5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 58.973183] ^ [ 58.973673] ffff88800d6a5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 58.974578] ffff88800d6a5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 58.975481] ================================================================== [ 58.976628] Disabling lock debugging due to kernel taint [ 61.064755] BUG: Bad rss-counter state mm:000000000718c66d type:MM_FILEPAGES val:33 [ 61.065957] BUG: Bad rss-counter state mm:000000000718c66d type:MM_ANONPAGES val:22 [ 61.467077] BUG: Bad rss-counter state mm:00000000e08d5cf4 type:MM_FILEPAGES val:33 [ 61.468181] BUG: Bad rss-counter state mm:00000000e08d5cf4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37141' (ECDSA) to the list of known hosts. 2023/06/20 23:53:41 fuzzer started 2023/06/20 23:53:41 dialing manager at localhost:36067 2023/06/20 23:53:41 checking machine... 2023/06/20 23:53:41 checking revisions... [ 62.181355] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:53:41 testing simple program... [ 62.242674] cgroup: Unknown subsys name 'net' [ 62.322190] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:53:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff818e3c52 RDX=ffff88800e91b680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801477f8e8 RSP=ffff88801477f838 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=1ffff110028eff0b R13=ffff88800d96e438 R14=ffff88801477f928 R15=ffff888008c15ca0 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 00007fb42eb0d900 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=00007fb42df2e6a8 CR3=000000000e454000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=7d7af4f8437c2bf200000000000ae988 XMM05=1250fdbaf477715c0000000000133830 XMM06=4fda316b135da52b00000000001328d0 XMM07=fb795ef6d65770560000000000122d50 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110028c1f66 RBX=000000000000000a RCX=0000000000000001 RDX=0000000000000cc0 RSI=000000000000000d RDI=ffff88801460fb30 RBP=dffffc0000000000 RSP=ffff88801460fa50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000d R13=0000000000000cc0 R14=ffff88801460fae0 R15=0000000000000cc0 RIP=ffffffff813ad61a 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 00007f7d31f71900 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=00007f7d32528618 CR3=0000000015dd8000 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=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