syzkaller login: [ 31.340882] BUG: Bad rss-counter state mm:00000000aa875868 type:MM_FILEPAGES val:33 [ 31.341413] BUG: Bad rss-counter state mm:00000000aa875868 type:MM_ANONPAGES val:22 [ 31.511131] ================================================================== [ 31.512590] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.513965] Read of size 8 at addr ffff88800e660ed8 by task sshd/220 [ 31.515108] [ 31.515428] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.516696] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.518119] Call Trace: [ 31.518616] [ 31.519013] dump_stack_lvl+0x91/0xf0 [ 31.519655] print_report+0xcc/0x620 [ 31.520287] ? __virt_addr_valid+0x102/0x340 [ 31.521008] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.521812] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.522672] kasan_report+0xbe/0xf0 [ 31.523320] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.524178] vma_interval_tree_remove+0xc75/0xec0 [ 31.524990] vma_prepare+0xc54/0x11a0 [ 31.525647] __split_vma+0x5af/0x950 [ 31.526304] ? __pfx___split_vma+0x10/0x10 [ 31.527048] ? find_held_lock+0x2c/0x110 [ 31.527764] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.528542] ? lock_is_held_type+0x9f/0x120 [ 31.529238] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.530020] ? mtree_range_walk+0x632/0x900 [ 31.530763] ? mas_walk+0x5c7/0x7c0 [ 31.531358] do_vmi_munmap+0x1f1/0x2b0 [ 31.531950] mmap_region+0x1f9/0x2660 [ 31.532526] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.533139] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.533984] ? __pfx_lock_acquire+0x10/0x10 [ 31.534634] ? __pfx_mmap_region+0x10/0x10 [ 31.535272] ? security_mmap_addr+0x7d/0xa0 [ 31.535910] ? get_unmapped_area+0x1f5/0x3f0 [ 31.536560] do_mmap+0x854/0xf00 [ 31.537090] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.537696] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.538372] ksys_mmap_pgoff+0x3af/0x500 [ 31.538989] do_syscall_64+0x3f/0x90 [ 31.539473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.540118] RIP: 0033:0x7f1fe8bbbd82 [ 31.540569] 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 [ 31.542685] RSP: 002b:00007ffce4c7fe78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.543575] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1fe8bbbd82 [ 31.544419] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1fe7ff5000 [ 31.545255] RBP: 00007f1fe7ff5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.546087] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cfac775ec0 [ 31.546930] R13: 00007ffce4c7fe90 R14: 00007ffce4c7fec0 R15: 00007ffce4c80220 [ 31.547770] [ 31.548057] [ 31.548268] Allocated by task 213: [ 31.548693] kasan_save_stack+0x22/0x50 [ 31.549195] kasan_set_track+0x25/0x30 [ 31.549681] __kasan_slab_alloc+0x59/0x70 [ 31.550200] kmem_cache_alloc+0x16b/0x370 [ 31.550726] vm_area_dup+0x20/0x160 [ 31.551180] __split_vma+0x170/0x950 [ 31.551640] split_vma+0xc6/0x110 [ 31.552071] mprotect_fixup+0x8d2/0xb30 [ 31.552654] do_mprotect_pkey+0x87e/0xd40 [ 31.553167] __x64_sys_mprotect+0x78/0xc0 [ 31.553682] do_syscall_64+0x3f/0x90 [ 31.554152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.554796] [ 31.555009] Freed by task 203: [ 31.555394] kasan_save_stack+0x22/0x50 [ 31.555887] kasan_set_track+0x25/0x30 [ 31.556375] kasan_save_free_info+0x2b/0x50 [ 31.556901] __kasan_slab_free+0x10a/0x190 [ 31.557422] kmem_cache_free+0x10d/0x4d0 [ 31.557931] rcu_core+0x8c8/0x2860 [ 31.558396] __do_softirq+0x1b7/0x7d4 [ 31.558930] [ 31.559142] Last potentially related work creation: [ 31.559714] kasan_save_stack+0x22/0x50 [ 31.560215] __kasan_record_aux_stack+0x8e/0xa0 [ 31.560775] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.561410] remove_vma+0x139/0x170 [ 31.561855] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.562405] do_vmi_munmap+0x1f1/0x2b0 [ 31.562880] __vm_munmap+0x138/0x3a0 [ 31.563337] __x64_sys_munmap+0x59/0x80 [ 31.563831] do_syscall_64+0x3f/0x90 [ 31.564312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.564951] [ 31.565162] The buggy address belongs to the object at ffff88800e660e80 [ 31.565162] which belongs to the cache vm_area_struct of size 168 [ 31.566643] The buggy address is located 88 bytes inside of [ 31.566643] freed 168-byte region [ffff88800e660e80, ffff88800e660f28) [ 31.568029] [ 31.568242] The buggy address belongs to the physical page: [ 31.568899] page:00000000650fbac3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe660 [ 31.569974] memcg:ffff88800d571f01 [ 31.570420] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.571115] page_type: 0xffffffff() [ 31.571559] raw: 0100000000000200 ffff8880087a0c80 ffffea0000392740 dead000000000003 [ 31.572458] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d571f01 [ 31.573353] page dumped because: kasan: bad access detected [ 31.574015] [ 31.574226] Memory state around the buggy address: [ 31.574810] ffff88800e660d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.575660] ffff88800e660e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.576509] >ffff88800e660e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.577363] ^ [ 31.578081] ffff88800e660f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.578954] ffff88800e660f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.579791] ================================================================== [ 31.580801] Disabling lock debugging due to kernel taint [ 34.175494] BUG: Bad rss-counter state mm:00000000b09068ba type:MM_FILEPAGES val:33 [ 34.176551] BUG: Bad rss-counter state mm:00000000b09068ba type:MM_ANONPAGES val:22 [ 34.597789] BUG: Bad rss-counter state mm:000000002fde82ab type:MM_FILEPAGES val:33 [ 34.598794] BUG: Bad rss-counter state mm:000000002fde82ab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59541' (ECDSA) to the list of known hosts. 2023/06/20 17:05:39 fuzzer started 2023/06/20 17:05:40 dialing manager at localhost:36067 2023/06/20 17:05:40 checking machine... 2023/06/20 17:05:40 checking revisions... [ 35.300141] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:05:40 testing simple program... [ 35.342970] cgroup: Unknown subsys name 'net' [ 35.389608] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:05:39 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8113b95a RDX=00000000000013b9 RSI=00000000000013b9 RDI=ffffffff864ee8d4 RBP=ffff8880147af4c0 RSP=ffff8880147af3f8 R8 =0000000000000000 R9 =ffff8880147af4a8 R10=0000000000038001 R11=000000000001ddb6 R12=ffff8880147af4c8 R13=ffff8880147af4b0 R14=ffff8880147af4a9 R15=ffff8880147af468 RIP=ffffffff8113077a 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f488813a900 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=00007f488753d930 CR3=000000000c7f8000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=fe590a55c9d4f77900000000000ae988 XMM05=f233c6c1f97d3aaf0000000000132d10 XMM06=4fda316b135da52b0000000000131b00 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888019893cd8 RCX=0000000000000000 RDX=1ffffffff0ba7c92 RSI=0000000000000000 RDI=ffffffff870a85a0 RBP=ffff888019893cf0 RSP=ffff888016eb7d10 R8 =0000000000000002 R9 =0000000000000000 R10=ffff888019893cc7 R11=0000000000000000 R12=ffffffff870a85a0 R13=0000000000000000 R14=ffffffff87b6a200 R15=0000000000000000 RIP=ffffffff812db5c9 RFL=00000282 [--S----] 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 00007fe27663e900 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=00007fff73475000 CR3=000000000ef58000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000