syzkaller login: [ 30.681270] BUG: Bad rss-counter state mm:0000000053d8bdc7 type:MM_FILEPAGES val:33 [ 30.682292] BUG: Bad rss-counter state mm:0000000053d8bdc7 type:MM_ANONPAGES val:22 [ 30.846803] ================================================================== [ 30.847750] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.848715] Read of size 8 at addr ffff88800f51bed8 by task sshd/220 [ 30.849645] [ 30.849884] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.850770] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.851835] Call Trace: [ 30.852172] [ 30.852460] dump_stack_lvl+0x91/0xf0 [ 30.852979] print_report+0xcc/0x620 [ 30.853497] ? __virt_addr_valid+0x102/0x340 [ 30.854066] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854682] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.855319] kasan_report+0xbe/0xf0 [ 30.855818] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.856448] vma_interval_tree_remove+0xc75/0xec0 [ 30.857089] vma_prepare+0xc54/0x11a0 [ 30.857579] __split_vma+0x5af/0x950 [ 30.858078] ? __pfx___split_vma+0x10/0x10 [ 30.858615] ? find_held_lock+0x2c/0x110 [ 30.859165] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.859741] ? lock_is_held_type+0x9f/0x120 [ 30.860283] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.860931] ? mtree_range_walk+0x632/0x900 [ 30.861505] ? mas_walk+0x5c7/0x7c0 [ 30.862015] do_vmi_munmap+0x1f1/0x2b0 [ 30.862518] mmap_region+0x1f9/0x2660 [ 30.863027] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.863554] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.864294] ? __pfx_lock_acquire+0x10/0x10 [ 30.864846] ? __pfx_mmap_region+0x10/0x10 [ 30.865415] ? security_mmap_addr+0x7d/0xa0 [ 30.865959] ? get_unmapped_area+0x1f5/0x3f0 [ 30.866519] do_mmap+0x854/0xf00 [ 30.866986] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.867491] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.868065] ksys_mmap_pgoff+0x3af/0x500 [ 30.868574] do_syscall_64+0x3f/0x90 [ 30.869068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.869764] RIP: 0033:0x7f39bb264d82 [ 30.870223] 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 [ 30.872413] RSP: 002b:00007ffd068800c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.873364] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39bb264d82 [ 30.874233] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f39ba69e000 [ 30.875118] RBP: 00007f39ba69e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.875986] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557e2218f60 [ 30.876859] R13: 00007ffd068800e0 R14: 00007ffd06880110 R15: 00007ffd06880470 [ 30.877775] [ 30.878070] [ 30.878288] Allocated by task 213: [ 30.878722] kasan_save_stack+0x22/0x50 [ 30.879243] kasan_set_track+0x25/0x30 [ 30.879756] __kasan_slab_alloc+0x59/0x70 [ 30.880298] kmem_cache_alloc+0x16b/0x370 [ 30.880851] vm_area_dup+0x20/0x160 [ 30.881345] __split_vma+0x170/0x950 [ 30.881831] split_vma+0xc6/0x110 [ 30.882277] mprotect_fixup+0x8d2/0xb30 [ 30.882801] do_mprotect_pkey+0x87e/0xd40 [ 30.883338] __x64_sys_mprotect+0x78/0xc0 [ 30.883890] do_syscall_64+0x3f/0x90 [ 30.884374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.885033] [ 30.885272] Freed by task 213: [ 30.885667] kasan_save_stack+0x22/0x50 [ 30.886200] kasan_set_track+0x25/0x30 [ 30.886695] kasan_save_free_info+0x2b/0x50 [ 30.887250] __kasan_slab_free+0x10a/0x190 [ 30.887821] kmem_cache_free+0x10d/0x4d0 [ 30.888336] rcu_core+0x8c8/0x2860 [ 30.888794] __do_softirq+0x1b7/0x7d4 [ 30.889296] [ 30.889517] Last potentially related work creation: [ 30.890117] kasan_save_stack+0x22/0x50 [ 30.890626] __kasan_record_aux_stack+0x8e/0xa0 [ 30.891215] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.891892] remove_vma+0x139/0x170 [ 30.892358] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.892939] do_vmi_munmap+0x1f1/0x2b0 [ 30.893464] __vm_munmap+0x138/0x3a0 [ 30.893953] __x64_sys_munmap+0x59/0x80 [ 30.894464] do_syscall_64+0x3f/0x90 [ 30.894955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.895611] [ 30.895856] The buggy address belongs to the object at ffff88800f51be80 [ 30.895856] which belongs to the cache vm_area_struct of size 168 [ 30.897367] The buggy address is located 88 bytes inside of [ 30.897367] freed 168-byte region [ffff88800f51be80, ffff88800f51bf28) [ 30.898815] [ 30.899033] The buggy address belongs to the physical page: [ 30.899703] page:0000000058439f59 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf51b [ 30.900835] memcg:ffff88800d620201 [ 30.901289] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.901951] page_type: 0xffffffff() [ 30.902413] raw: 0100000000000200 ffff8880087a0c80 ffffea000066c940 dead000000000002 [ 30.903353] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d620201 [ 30.904300] page dumped because: kasan: bad access detected [ 30.904981] [ 30.905217] Memory state around the buggy address: [ 30.905824] ffff88800f51bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.906709] ffff88800f51be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.907592] >ffff88800f51be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.908472] ^ [ 30.909241] ffff88800f51bf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.910124] ffff88800f51bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.910993] ================================================================== [ 30.912137] Disabling lock debugging due to kernel taint [ 32.808456] BUG: Bad rss-counter state mm:00000000422e757d type:MM_FILEPAGES val:33 [ 32.809382] BUG: Bad rss-counter state mm:00000000422e757d type:MM_ANONPAGES val:22 [ 33.353135] BUG: Bad rss-counter state mm:000000000553f280 type:MM_FILEPAGES val:33 [ 33.354788] BUG: Bad rss-counter state mm:000000000553f280 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25778' (ECDSA) to the list of known hosts. 2023/06/20 13:20:22 fuzzer started 2023/06/20 13:20:22 dialing manager at localhost:36067 2023/06/20 13:20:22 checking machine... 2023/06/20 13:20:22 checking revisions... [ 34.125312] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:20:23 testing simple program... [ 34.175513] cgroup: Unknown subsys name 'net' [ 34.239816] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:20:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce2c240 RCX=0000000000000000 RDX=ffffffff8542a6c0 RSI=ffffffff813fa994 RDI=ffff88806ce2c240 RBP=fffffbfff0a81e48 RSP=ffffffff85407d78 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff888008c04000 R12=ffff88806ce2c240 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff813fa994 RFL=00000093 [--S-A-C] 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 0000000000000000 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=00007f6fbae8f000 CR3=00000000098ca000 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=0c4719f2c2a263aedf4c7287a973b515 XMM02=ec2efd57dc4c00df000000000011bc78 XMM03=89d48b6ba4b6040a000000000011bd48 XMM04=4221c19851093f7600000000000ae988 XMM05=ac59d1c8657fae760000000000133490 XMM06=4fda316b135da52b0000000000132b28 XMM07=e042d86d42eb936e00000000001237a8 XMM08=89d48b6ba4b6040a000000000011bd48 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000246 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84535ffc RBP=ffff888016aee528 RSP=ffff88800c6cfa60 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=0000000000000246 RIP=ffffffff845118ab 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f950039a900 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=00007ffc014aa000 CR3=0000000016a80000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000