syzkaller login: [ 38.832761] BUG: Bad rss-counter state mm:00000000d51177f5 type:MM_FILEPAGES val:33 [ 38.833526] BUG: Bad rss-counter state mm:00000000d51177f5 type:MM_ANONPAGES val:22 [ 38.961331] ================================================================== [ 38.962004] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.962709] Read of size 8 at addr ffff88800ec285c8 by task sshd/219 [ 38.963264] [ 38.963417] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.964078] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.964792] Call Trace: [ 38.965022] [ 38.965232] dump_stack_lvl+0x91/0xf0 [ 38.965830] print_report+0xcc/0x620 [ 38.966162] ? __virt_addr_valid+0x102/0x340 [ 38.966539] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.966954] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.967384] kasan_report+0xbe/0xf0 [ 38.967784] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.968249] vma_interval_tree_remove+0xc75/0xec0 [ 38.968668] vma_prepare+0xc54/0x11a0 [ 38.969000] __split_vma+0x5af/0x950 [ 38.969327] ? __pfx___split_vma+0x10/0x10 [ 38.969699] ? find_held_lock+0x2c/0x110 [ 38.970066] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.970459] ? lock_is_held_type+0x9f/0x120 [ 38.970881] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.971303] ? mtree_range_walk+0x632/0x900 [ 38.971695] ? mas_walk+0x5c7/0x7c0 [ 38.972069] do_vmi_munmap+0x1f1/0x2b0 [ 38.972432] mmap_region+0x1f9/0x2660 [ 38.972761] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.973136] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.973681] ? __pfx_lock_acquire+0x10/0x10 [ 38.974044] ? __pfx_mmap_region+0x10/0x10 [ 38.974458] ? security_mmap_addr+0x7d/0xa0 [ 38.974843] ? get_unmapped_area+0x1f5/0x3f0 [ 38.975199] do_mmap+0x854/0xf00 [ 38.975516] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.975937] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.976364] ksys_mmap_pgoff+0x3af/0x500 [ 38.976757] do_syscall_64+0x3f/0x90 [ 38.977084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.977583] RIP: 0033:0x7fac8f041d82 [ 38.977915] 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 [ 38.979421] RSP: 002b:00007fffa42240d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.980088] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac8f041d82 [ 38.980700] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac8e47b000 [ 38.981317] RBP: 00007fac8e47b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.981896] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564694327b20 [ 38.982461] R13: 00007fffa42240f0 R14: 00007fffa4224120 R15: 00007fffa4224480 [ 38.983108] [ 38.983295] [ 38.983434] Allocated by task 212: [ 38.983707] kasan_save_stack+0x22/0x50 [ 38.984127] kasan_set_track+0x25/0x30 [ 38.984464] __kasan_slab_alloc+0x59/0x70 [ 38.984816] kmem_cache_alloc+0x16b/0x370 [ 38.985148] vm_area_dup+0x20/0x160 [ 38.985440] __split_vma+0x170/0x950 [ 38.985740] split_vma+0xc6/0x110 [ 38.986044] mprotect_fixup+0x8d2/0xb30 [ 38.986411] do_mprotect_pkey+0x87e/0xd40 [ 38.986810] __x64_sys_mprotect+0x78/0xc0 [ 38.987170] do_syscall_64+0x3f/0x90 [ 38.987475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.987922] [ 38.988062] Freed by task 212: [ 38.988324] kasan_save_stack+0x22/0x50 [ 38.988672] kasan_set_track+0x25/0x30 [ 38.988992] kasan_save_free_info+0x2b/0x50 [ 38.989336] __kasan_slab_free+0x10a/0x190 [ 38.989709] kmem_cache_free+0x10d/0x4d0 [ 38.990094] rcu_core+0x8c8/0x2860 [ 38.990394] __do_softirq+0x1b7/0x7d4 [ 38.990751] [ 38.990897] Last potentially related work creation: [ 38.991286] kasan_save_stack+0x22/0x50 [ 38.991670] __kasan_record_aux_stack+0x8e/0xa0 [ 38.992102] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.992582] remove_vma+0x139/0x170 [ 38.992893] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.993246] do_vmi_munmap+0x1f1/0x2b0 [ 38.993587] __vm_munmap+0x138/0x3a0 [ 38.993876] __x64_sys_munmap+0x59/0x80 [ 38.994191] do_syscall_64+0x3f/0x90 [ 38.994511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.994928] [ 38.995067] The buggy address belongs to the object at ffff88800ec28570 [ 38.995067] which belongs to the cache vm_area_struct of size 168 [ 38.996127] The buggy address is located 88 bytes inside of [ 38.996127] freed 168-byte region [ffff88800ec28570, ffff88800ec28618) [ 38.997035] [ 38.997175] The buggy address belongs to the physical page: [ 38.997624] page:00000000c65006cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec28 [ 38.998327] memcg:ffff88800e8e8601 [ 38.998620] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.999098] page_type: 0xffffffff() [ 38.999383] raw: 0100000000000200 ffff8880087a0c80 ffffea0000265f80 dead000000000007 [ 39.000178] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8e8601 [ 39.000963] page dumped because: kasan: bad access detected [ 39.001496] [ 39.001635] Memory state around the buggy address: [ 39.002014] ffff88800ec28480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.002589] ffff88800ec28500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.003157] >ffff88800ec28580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.003709] ^ [ 39.004220] ffff88800ec28600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.004827] ffff88800ec28680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.005392] ================================================================== [ 39.006118] Disabling lock debugging due to kernel taint [ 40.960669] BUG: Bad rss-counter state mm:00000000c72f019f type:MM_FILEPAGES val:33 [ 40.961371] BUG: Bad rss-counter state mm:00000000c72f019f type:MM_ANONPAGES val:22 [ 41.327230] BUG: Bad rss-counter state mm:000000004958f4f9 type:MM_FILEPAGES val:33 [ 41.328004] BUG: Bad rss-counter state mm:000000004958f4f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41526' (ECDSA) to the list of known hosts. 2023/06/21 09:04:48 fuzzer started 2023/06/21 09:04:49 dialing manager at localhost:36067 2023/06/21 09:04:49 checking machine... 2023/06/21 09:04:49 checking revisions... [ 41.931181] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:04:49 testing simple program... [ 41.971491] cgroup: Unknown subsys name 'net' [ 42.053325] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:04:48 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=00007ffd8948ba98 CR3=0000000005482000 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=00007fef4bcd3510000056363f27b790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801987eeb0 RCX=ffffffff812e0135 RDX=1ffff11002cf07aa RSI=0000000000000000 RDI=ffff888016783d50 RBP=ffff888016783d10 RSP=ffff88800ebdfcc8 R8 =0000000000000001 R9 =ffffed1001d7bf87 R10=0000000000000003 R11=00000000000b6a61 R12=0000000000000283 R13=ffffea0000661f80 R14=ffffffff818c73ee R15=ffff88800c501580 RIP=ffffffff845195a1 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 00007f759f8a4900 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=00007f759fe5b618 CR3=0000000015bf0000 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=563412feff00545000000000000080fe 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