syzkaller login: [ 30.389621] BUG: Bad rss-counter state mm:000000007f24a7ea type:MM_FILEPAGES val:33 [ 30.391809] BUG: Bad rss-counter state mm:000000007f24a7ea type:MM_ANONPAGES val:22 [ 30.572307] ================================================================== [ 30.573379] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.574592] Read of size 8 at addr ffff88800ed95df0 by task sshd/219 [ 30.575582] [ 30.575846] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.576618] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.577357] Call Trace: [ 30.577594] [ 30.577811] dump_stack_lvl+0x91/0xf0 [ 30.578180] print_report+0xcc/0x620 [ 30.578540] ? __virt_addr_valid+0x102/0x340 [ 30.578953] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.579424] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.579899] kasan_report+0xbe/0xf0 [ 30.580255] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.580722] vma_interval_tree_remove+0xc75/0xec0 [ 30.581170] vma_prepare+0xc54/0x11a0 [ 30.581530] __split_vma+0x5af/0x950 [ 30.581882] ? __pfx___split_vma+0x10/0x10 [ 30.582281] ? find_held_lock+0x2c/0x110 [ 30.582669] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.583096] ? lock_is_held_type+0x9f/0x120 [ 30.583500] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.583985] ? mtree_range_walk+0x632/0x900 [ 30.584401] ? mas_walk+0x5c7/0x7c0 [ 30.584759] do_vmi_munmap+0x1f1/0x2b0 [ 30.585124] mmap_region+0x1f9/0x2660 [ 30.585488] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.585868] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.586406] ? __pfx_lock_acquire+0x10/0x10 [ 30.586803] ? __pfx_mmap_region+0x10/0x10 [ 30.587195] ? security_mmap_addr+0x7d/0xa0 [ 30.587609] ? get_unmapped_area+0x1f5/0x3f0 [ 30.588019] do_mmap+0x854/0xf00 [ 30.588344] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.588710] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.589131] ksys_mmap_pgoff+0x3af/0x500 [ 30.589509] do_syscall_64+0x3f/0x90 [ 30.589865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.590352] RIP: 0033:0x7f20aae66d82 [ 30.590694] 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 [ 30.592287] RSP: 002b:00007ffd87dd07a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.592962] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f20aae66d82 [ 30.593594] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f20aa2a0000 [ 30.594228] RBP: 00007f20aa2a0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.594859] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb18016b20 [ 30.595501] R13: 00007ffd87dd07c0 R14: 00007ffd87dd07f0 R15: 00007ffd87dd0b50 [ 30.596149] [ 30.596368] [ 30.596530] Allocated by task 212: [ 30.596848] kasan_save_stack+0x22/0x50 [ 30.597226] kasan_set_track+0x25/0x30 [ 30.597593] __kasan_slab_alloc+0x59/0x70 [ 30.597978] kmem_cache_alloc+0x16b/0x370 [ 30.598358] vm_area_dup+0x20/0x160 [ 30.598699] __split_vma+0x170/0x950 [ 30.599044] split_vma+0xc6/0x110 [ 30.599370] mprotect_fixup+0x8d2/0xb30 [ 30.599760] do_mprotect_pkey+0x87e/0xd40 [ 30.600145] __x64_sys_mprotect+0x78/0xc0 [ 30.600537] do_syscall_64+0x3f/0x90 [ 30.600891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.601369] [ 30.601528] Freed by task 212: [ 30.601822] kasan_save_stack+0x22/0x50 [ 30.602196] kasan_set_track+0x25/0x30 [ 30.602558] kasan_save_free_info+0x2b/0x50 [ 30.602951] __kasan_slab_free+0x10a/0x190 [ 30.603341] kmem_cache_free+0x10d/0x4d0 [ 30.603724] rcu_core+0x8c8/0x2860 [ 30.604055] __do_softirq+0x1b7/0x7d4 [ 30.604410] [ 30.604568] Last potentially related work creation: [ 30.604999] kasan_save_stack+0x22/0x50 [ 30.605372] __kasan_record_aux_stack+0x8e/0xa0 [ 30.605798] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.606265] remove_vma+0x139/0x170 [ 30.606596] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.607007] do_vmi_munmap+0x1f1/0x2b0 [ 30.607364] __vm_munmap+0x138/0x3a0 [ 30.607716] __x64_sys_munmap+0x59/0x80 [ 30.608084] do_syscall_64+0x3f/0x90 [ 30.608432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.608908] [ 30.609067] Second to last potentially related work creation: [ 30.609574] kasan_save_stack+0x22/0x50 [ 30.609944] __kasan_record_aux_stack+0x8e/0xa0 [ 30.610371] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.610843] remove_vma+0x139/0x170 [ 30.611171] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.611584] do_vmi_munmap+0x1f1/0x2b0 [ 30.611944] mmap_region+0x1f9/0x2660 [ 30.612298] do_mmap+0x854/0xf00 [ 30.612617] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.612975] ksys_mmap_pgoff+0x3af/0x500 [ 30.613351] do_syscall_64+0x3f/0x90 [ 30.613698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.614174] [ 30.614337] The buggy address belongs to the object at ffff88800ed95d98 [ 30.614337] which belongs to the cache vm_area_struct of size 168 [ 30.615423] The buggy address is located 88 bytes inside of [ 30.615423] freed 168-byte region [ffff88800ed95d98, ffff88800ed95e40) [ 30.616542] [ 30.616701] The buggy address belongs to the physical page: [ 30.617185] page:00000000edc489f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed95 [ 30.617986] memcg:ffff88800edaa301 [ 30.618298] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.618815] page_type: 0xffffffff() [ 30.619147] raw: 0100000000000200 ffff8880087a0c80 ffffea0000395b80 dead000000000007 [ 30.619840] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edaa301 [ 30.620506] page dumped because: kasan: bad access detected [ 30.620988] [ 30.621144] Memory state around the buggy address: [ 30.621573] ffff88800ed95c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.622198] ffff88800ed95d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.622825] >ffff88800ed95d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.623442] ^ [ 30.624038] ffff88800ed95e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.624671] ffff88800ed95e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.625294] ================================================================== [ 30.625970] Disabling lock debugging due to kernel taint [ 32.468612] BUG: Bad rss-counter state mm:000000003735fc2a type:MM_FILEPAGES val:33 [ 32.469742] BUG: Bad rss-counter state mm:000000003735fc2a type:MM_ANONPAGES val:22 [ 32.909089] BUG: Bad rss-counter state mm:00000000c00c4a5d type:MM_FILEPAGES val:33 [ 32.910521] BUG: Bad rss-counter state mm:00000000c00c4a5d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62060' (ECDSA) to the list of known hosts. 2023/06/21 01:23:16 fuzzer started 2023/06/21 01:23:17 dialing manager at localhost:36067 2023/06/21 01:23:17 checking machine... 2023/06/21 01:23:17 checking revisions... [ 33.608623] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:23:17 testing simple program... [ 33.656675] cgroup: Unknown subsys name 'net' [ 33.694701] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:23:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f852a5b1000 CR3=000000000fede000 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=2036313a33323a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a33323a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8162f559 RDX=ffff888015c6d1c0 RSI=0000000000000000 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88801837fb40 R8 =0000000000000006 R9 =0000000000000000 R10=ffffffffffffffff R11=0000000000000000 R12=0000000000000000 R13=ffffea00006be0c0 R14=ffff88801837fe00 R15=dffffc0000000000 RIP=ffffffff814c0864 RFL=00000213 [----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 00007fef3ff6b900 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=00007fff15ab0000 CR3=000000000e772000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000