syzkaller login: [ 38.935200] BUG: Bad rss-counter state mm:00000000f9ff7071 type:MM_FILEPAGES val:33 [ 38.935929] BUG: Bad rss-counter state mm:00000000f9ff7071 type:MM_ANONPAGES val:22 [ 38.964972] ================================================================== [ 38.965738] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.966395] Read of size 8 at addr ffff888016da54e0 by task sshd/226 [ 38.966914] [ 38.967058] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.967670] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.968445] Call Trace: [ 38.968708] [ 38.968917] dump_stack_lvl+0x91/0xf0 [ 38.969271] print_report+0xcc/0x620 [ 38.969628] ? __virt_addr_valid+0x102/0x340 [ 38.970028] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.970470] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.970944] kasan_report+0xbe/0xf0 [ 38.971305] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.971732] vma_interval_tree_remove+0xc75/0xec0 [ 38.972141] vma_prepare+0xc54/0x11a0 [ 38.972460] __split_vma+0x5af/0x950 [ 38.972784] ? __pfx___split_vma+0x10/0x10 [ 38.973183] ? find_held_lock+0x2c/0x110 [ 38.973562] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.973951] ? lock_is_held_type+0x9f/0x120 [ 38.974320] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.974747] ? mtree_range_walk+0x632/0x900 [ 38.975138] ? mas_walk+0x5c7/0x7c0 [ 38.975465] do_vmi_munmap+0x1f1/0x2b0 [ 38.975800] mmap_region+0x1f9/0x2660 [ 38.976130] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.976481] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.976963] ? __pfx_lock_acquire+0x10/0x10 [ 38.977328] ? __pfx_mmap_region+0x10/0x10 [ 38.977696] ? security_mmap_addr+0x7d/0xa0 [ 38.978050] ? get_unmapped_area+0x1f5/0x3f0 [ 38.978420] do_mmap+0x854/0xf00 [ 38.978721] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.979059] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.979466] ksys_mmap_pgoff+0x3af/0x500 [ 38.979812] do_syscall_64+0x3f/0x90 [ 38.980142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.980587] RIP: 0033:0x7fd0a8ae3d82 [ 38.980902] 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 [ 38.982335] RSP: 002b:00007ffc042fcdf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.982946] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd0a8ae3d82 [ 38.983532] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0a7f1d000 [ 38.984098] RBP: 00007fd0a7f1d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.984674] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c5dcf16d90 [ 38.985241] R13: 00007ffc042fce10 R14: 00007ffc042fce40 R15: 00007ffc042fd1a0 [ 38.985821] [ 38.986019] [ 38.986170] Allocated by task 219: [ 38.986462] kasan_save_stack+0x22/0x50 [ 38.986808] kasan_set_track+0x25/0x30 [ 38.987155] __kasan_slab_alloc+0x59/0x70 [ 38.987511] kmem_cache_alloc+0x16b/0x370 [ 38.987863] vm_area_dup+0x20/0x160 [ 38.988172] __split_vma+0x170/0x950 [ 38.988488] split_vma+0xc6/0x110 [ 38.988786] mprotect_fixup+0x8d2/0xb30 [ 38.989122] do_mprotect_pkey+0x87e/0xd40 [ 38.989475] __x64_sys_mprotect+0x78/0xc0 [ 38.989827] do_syscall_64+0x3f/0x90 [ 38.990143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.990579] [ 38.990725] Freed by task 204: [ 38.990997] kasan_save_stack+0x22/0x50 [ 38.991370] kasan_set_track+0x25/0x30 [ 38.991706] kasan_save_free_info+0x2b/0x50 [ 38.992066] __kasan_slab_free+0x10a/0x190 [ 38.992425] kmem_cache_free+0x10d/0x4d0 [ 38.992769] rcu_core+0x8c8/0x2860 [ 38.993072] __do_softirq+0x1b7/0x7d4 [ 38.993398] [ 38.993547] Last potentially related work creation: [ 38.993945] kasan_save_stack+0x22/0x50 [ 38.994290] __kasan_record_aux_stack+0x8e/0xa0 [ 38.994683] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.995129] remove_vma+0x139/0x170 [ 38.995438] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.995819] do_vmi_munmap+0x1f1/0x2b0 [ 38.996148] __vm_munmap+0x138/0x3a0 [ 38.996468] __x64_sys_munmap+0x59/0x80 [ 38.996809] do_syscall_64+0x3f/0x90 [ 38.997134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.997581] [ 38.997730] The buggy address belongs to the object at ffff888016da5488 [ 38.997730] which belongs to the cache vm_area_struct of size 168 [ 38.998724] The buggy address is located 88 bytes inside of [ 38.998724] freed 168-byte region [ffff888016da5488, ffff888016da5530) [ 38.999694] [ 38.999843] The buggy address belongs to the physical page: [ 39.000287] page:0000000094eafdeb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16da5 [ 39.001023] memcg:ffff888018ea4501 [ 39.001315] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.001752] page_type: 0xffffffff() [ 39.002059] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.002677] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ea4501 [ 39.003303] page dumped because: kasan: bad access detected [ 39.003749] [ 39.003897] Memory state around the buggy address: [ 39.004295] ffff888016da5380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.004874] ffff888016da5400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.005457] >ffff888016da5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.006037] ^ [ 39.006551] ffff888016da5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 39.007145] ffff888016da5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.007727] ================================================================== [ 39.008510] Disabling lock debugging due to kernel taint [ 40.404101] BUG: Bad rss-counter state mm:000000006140bbba type:MM_FILEPAGES val:33 [ 40.404851] BUG: Bad rss-counter state mm:000000006140bbba type:MM_ANONPAGES val:22 [ 40.790668] BUG: Bad rss-counter state mm:0000000012722c68 type:MM_FILEPAGES val:33 [ 40.791392] BUG: Bad rss-counter state mm:0000000012722c68 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57036' (ECDSA) to the list of known hosts. 2023/06/21 09:14:55 fuzzer started 2023/06/21 09:14:55 dialing manager at localhost:36067 2023/06/21 09:14:55 checking machine... 2023/06/21 09:14:55 checking revisions... [ 41.394705] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:14:55 testing simple program... [ 41.436587] cgroup: Unknown subsys name 'net' [ 41.469311] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:14:55 Registers: info registers vcpu 0 RAX=0000000000000046 RBX=ffff88807ffdc000 RCX=0000000000000000 RDX=1ffff110012d0c18 RSI=0000000000000008 RDI=ffff8880096860c0 RBP=ffff888009686000 RSP=ffff8880143a7800 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000006 R13=00000000000007d8 R14=0000000000000000 R15=ffff88806ce361f0 RIP=ffffffff8182e255 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 00007f7c7393a900 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=00007f7c72d66900 CR3=000000000c4ce000 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=0205e09aff4d588ab74aa4de19e45764 XMM02=eff9b2d0a8fce9cb000000000011bf10 XMM03=2c67c8bc2e329bc3000000000011c038 XMM04=f690e18695418f0200000000000ae988 XMM05=b8a68c5fc2e522b200000000001332c8 XMM06=6860aeb314f8829d0000000000131df0 XMM07=fb795ef6d65770560000000000122240 XMM08=2c67c8bc2e329bc3000000000011c038 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff85652d08 RCX=0000000000000000 RDX=1ffffffff0aca5a1 RSI=ffffffff814c84af RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016ea74d0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000000014 RIP=ffffffff814c0860 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 00007f7ca7616900 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=00007f7ca7bcd618 CR3=000000001a0e2000 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