syzkaller login: [ 28.801653] BUG: Bad rss-counter state mm:00000000de941395 type:MM_FILEPAGES val:33 [ 28.802953] BUG: Bad rss-counter state mm:00000000de941395 type:MM_ANONPAGES val:22 [ 28.839521] ================================================================== [ 28.840526] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.841496] Read of size 8 at addr ffff88801867e798 by task sshd/221 [ 28.842380] [ 28.842610] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.843510] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.844524] Call Trace: [ 28.844854] <TASK> [ 28.845146] dump_stack_lvl+0x91/0xf0 [ 28.845654] print_report+0xcc/0x620 [ 28.846176] ? __virt_addr_valid+0x102/0x340 [ 28.846743] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.847378] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.848020] kasan_report+0xbe/0xf0 [ 28.848520] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.849169] vma_interval_tree_remove+0xc75/0xec0 [ 28.849795] vma_prepare+0xc54/0x11a0 [ 28.850309] __split_vma+0x5af/0x950 [ 28.850807] ? __pfx___split_vma+0x10/0x10 [ 28.851360] ? find_held_lock+0x2c/0x110 [ 28.851904] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.852482] ? lock_is_held_type+0x9f/0x120 [ 28.853044] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.853678] ? mtree_range_walk+0x632/0x900 [ 28.854261] ? mas_walk+0x5c7/0x7c0 [ 28.854757] do_vmi_munmap+0x1f1/0x2b0 [ 28.855262] mmap_region+0x1f9/0x2660 [ 28.855762] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.856289] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.857020] ? __pfx_lock_acquire+0x10/0x10 [ 28.857580] ? __pfx_mmap_region+0x10/0x10 [ 28.858144] ? security_mmap_addr+0x7d/0xa0 [ 28.858700] ? get_unmapped_area+0x1f5/0x3f0 [ 28.859269] do_mmap+0x854/0xf00 [ 28.859717] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.860222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.860810] ksys_mmap_pgoff+0x3af/0x500 [ 28.861336] do_syscall_64+0x3f/0x90 [ 28.861829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.862512] RIP: 0033:0x7f66fb485d82 [ 28.862982] 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 [ 28.865213] RSP: 002b:00007ffce1159018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.866169] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f66fb485d82 [ 28.867049] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66fa8bf000 [ 28.867936] RBP: 00007f66fa8bf000 R08: 0000000000000009 R09: 0000000000001000 [ 28.868817] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f975fc8f70 [ 28.869704] R13: 00007ffce1159030 R14: 00007ffce1159060 R15: 00007ffce11593c0 [ 28.870609] </TASK> [ 28.870914] [ 28.871133] Allocated by task 214: [ 28.871587] kasan_save_stack+0x22/0x50 [ 28.872120] kasan_set_track+0x25/0x30 [ 28.872630] __kasan_slab_alloc+0x59/0x70 [ 28.873167] kmem_cache_alloc+0x16b/0x370 [ 28.873706] vm_area_dup+0x20/0x160 [ 28.874180] __split_vma+0x170/0x950 [ 28.874666] split_vma+0xc6/0x110 [ 28.875116] mprotect_fixup+0x8d2/0xb30 [ 28.875638] do_mprotect_pkey+0x87e/0xd40 [ 28.876185] __x64_sys_mprotect+0x78/0xc0 [ 28.876733] do_syscall_64+0x3f/0x90 [ 28.877225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.877911] [ 28.878135] Freed by task 214: [ 28.878544] kasan_save_stack+0x22/0x50 [ 28.879066] kasan_set_track+0x25/0x30 [ 28.879582] kasan_save_free_info+0x2b/0x50 [ 28.880145] __kasan_slab_free+0x10a/0x190 [ 28.880699] kmem_cache_free+0x10d/0x4d0 [ 28.881233] rcu_core+0x8c8/0x2860 [ 28.881706] __do_softirq+0x1b7/0x7d4 [ 28.882209] [ 28.882434] Last potentially related work creation: [ 28.883054] kasan_save_stack+0x22/0x50 [ 28.883575] __kasan_record_aux_stack+0x8e/0xa0 [ 28.884168] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.884835] remove_vma+0x139/0x170 [ 28.885316] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.885916] do_vmi_munmap+0x1f1/0x2b0 [ 28.886413] __vm_munmap+0x138/0x3a0 [ 28.886890] __x64_sys_munmap+0x59/0x80 [ 28.887401] do_syscall_64+0x3f/0x90 [ 28.887890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.888556] [ 28.888778] The buggy address belongs to the object at ffff88801867e740 [ 28.888778] which belongs to the cache vm_area_struct of size 168 [ 28.890338] The buggy address is located 88 bytes inside of [ 28.890338] freed 168-byte region [ffff88801867e740, ffff88801867e7e8) [ 28.891814] [ 28.892032] The buggy address belongs to the physical page: [ 28.892728] page:0000000060773094 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1867e [ 28.893891] memcg:ffff88800fb82b01 [ 28.894346] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.895018] page_type: 0xffffffff() [ 28.895491] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.896434] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb82b01 [ 28.897360] page dumped because: kasan: bad access detected [ 28.898055] [ 28.898270] Memory state around the buggy address: [ 28.898854] ffff88801867e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.899714] ffff88801867e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.900566] >ffff88801867e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.901404] ^ [ 28.901905] ffff88801867e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.902768] ffff88801867e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.903634] ================================================================== [ 28.904691] Disabling lock debugging due to kernel taint [ 30.908465] BUG: Bad rss-counter state mm:00000000a8a6baf6 type:MM_FILEPAGES val:33 [ 30.909649] BUG: Bad rss-counter state mm:00000000a8a6baf6 type:MM_ANONPAGES val:22 [ 31.284309] BUG: Bad rss-counter state mm:00000000d36bc04c type:MM_FILEPAGES val:33 [ 31.285465] BUG: Bad rss-counter state mm:00000000d36bc04c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40230' (ECDSA) to the list of known hosts. 2023/06/21 03:56:48 fuzzer started 2023/06/21 03:56:49 dialing manager at localhost:36067 2023/06/21 03:56:49 checking machine... 2023/06/21 03:56:49 checking revisions... [ 31.960898] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:56:49 testing simple program... [ 32.005143] cgroup: Unknown subsys name 'net' [ 32.052255] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:56:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b38 RCX=0000000000000001 RDX=1ffff1100d9c138a RSI=ffffffff818c8314 RDI=ffff88806ce09b44 RBP=ffff88806ce09c50 RSP=ffff88806ce09a50 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000246c8 R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff88801996d1c0 R15=ffff88800c4aa398 RIP=ffffffff813ad543 RFL=00000212 [----A--] 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 00007f5f797ee900 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=00007f5f79da5618 CR3=000000000c5ce000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ff7f7fc8460 CR3=000000000c556000 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=2c2444408514acadaa472b817ac053c0 XMM02=00000000001191b8eff9b2d0a8fce9cb XMM03=00000000001192882c67c8bc2e329bc3 XMM04=0acfbb8f75d6112a00000000000ae988 XMM05=e4cb8bb95a7664b600000000001307a8 XMM06=c291bd5c70af25b90000000000130630 XMM07=e042d86d42eb936e0000000000120b98 XMM08=58ef6d3c78d0ff720000000000119288 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000