syzkaller login: [ 30.373302] BUG: Bad rss-counter state mm:00000000535cb7d2 type:MM_FILEPAGES val:33 [ 30.375528] BUG: Bad rss-counter state mm:00000000535cb7d2 type:MM_ANONPAGES val:22 [ 30.540380] ================================================================== [ 30.541462] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.542562] Read of size 8 at addr ffff88801685d4e0 by task sshd/221 [ 30.543549] [ 30.543767] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.544653] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.545648] Call Trace: [ 30.545968] [ 30.546253] dump_stack_lvl+0x91/0xf0 [ 30.546743] print_report+0xcc/0x620 [ 30.547227] ? __virt_addr_valid+0x102/0x340 [ 30.547784] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.548424] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.549044] kasan_report+0xbe/0xf0 [ 30.549526] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.550151] vma_interval_tree_remove+0xc75/0xec0 [ 30.550765] vma_prepare+0xc54/0x11a0 [ 30.551247] __split_vma+0x5af/0x950 [ 30.551717] ? __pfx___split_vma+0x10/0x10 [ 30.552264] ? find_held_lock+0x2c/0x110 [ 30.552787] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.553359] ? lock_is_held_type+0x9f/0x120 [ 30.553901] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.554509] ? mtree_range_walk+0x632/0x900 [ 30.555066] ? mas_walk+0x5c7/0x7c0 [ 30.555546] do_vmi_munmap+0x1f1/0x2b0 [ 30.556040] mmap_region+0x1f9/0x2660 [ 30.556542] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.557053] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.557768] ? __pfx_lock_acquire+0x10/0x10 [ 30.558302] ? __pfx_mmap_region+0x10/0x10 [ 30.558833] ? security_mmap_addr+0x7d/0xa0 [ 30.559364] ? get_unmapped_area+0x1f5/0x3f0 [ 30.559908] do_mmap+0x854/0xf00 [ 30.560354] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.560858] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.561426] ksys_mmap_pgoff+0x3af/0x500 [ 30.561933] do_syscall_64+0x3f/0x90 [ 30.562417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.563072] RIP: 0033:0x7f7bf9256d82 [ 30.563535] 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 [ 30.565696] RSP: 002b:00007ffe0dd785a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.566612] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7bf9256d82 [ 30.567464] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7bf8690000 [ 30.568325] RBP: 00007f7bf8690000 R08: 0000000000000009 R09: 0000000000001000 [ 30.569175] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587cff28f70 [ 30.570025] R13: 00007ffe0dd785c0 R14: 00007ffe0dd785f0 R15: 00007ffe0dd78950 [ 30.570881] [ 30.571178] [ 30.571398] Allocated by task 214: [ 30.571827] kasan_save_stack+0x22/0x50 [ 30.572333] kasan_set_track+0x25/0x30 [ 30.572831] __kasan_slab_alloc+0x59/0x70 [ 30.573373] kmem_cache_alloc+0x16b/0x370 [ 30.573902] vm_area_dup+0x20/0x160 [ 30.574357] __split_vma+0x170/0x950 [ 30.574823] split_vma+0xc6/0x110 [ 30.575266] mprotect_fixup+0x8d2/0xb30 [ 30.575769] do_mprotect_pkey+0x87e/0xd40 [ 30.576311] __x64_sys_mprotect+0x78/0xc0 [ 30.576845] do_syscall_64+0x3f/0x90 [ 30.577324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.577970] [ 30.578194] Freed by task 204: [ 30.578587] kasan_save_stack+0x22/0x50 [ 30.579090] kasan_set_track+0x25/0x30 [ 30.579600] kasan_save_free_info+0x2b/0x50 [ 30.580139] __kasan_slab_free+0x10a/0x190 [ 30.580694] kmem_cache_free+0x10d/0x4d0 [ 30.581202] rcu_core+0x8c8/0x2860 [ 30.581645] __do_softirq+0x1b7/0x7d4 [ 30.582124] [ 30.582344] Last potentially related work creation: [ 30.582938] kasan_save_stack+0x22/0x50 [ 30.583457] __kasan_record_aux_stack+0x8e/0xa0 [ 30.584041] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.584700] remove_vma+0x139/0x170 [ 30.585156] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.585725] do_vmi_munmap+0x1f1/0x2b0 [ 30.586216] __vm_munmap+0x138/0x3a0 [ 30.586684] __x64_sys_munmap+0x59/0x80 [ 30.587179] do_syscall_64+0x3f/0x90 [ 30.587654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.588311] [ 30.588528] The buggy address belongs to the object at ffff88801685d488 [ 30.588528] which belongs to the cache vm_area_struct of size 168 [ 30.590009] The buggy address is located 88 bytes inside of [ 30.590009] freed 168-byte region [ffff88801685d488, ffff88801685d530) [ 30.591424] [ 30.591645] The buggy address belongs to the physical page: [ 30.592311] page:000000008c51c994 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1685d [ 30.593405] memcg:ffff888015c82201 [ 30.593832] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.594484] page_type: 0xffffffff() [ 30.594936] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.595855] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c82201 [ 30.596786] page dumped because: kasan: bad access detected [ 30.597454] [ 30.597673] Memory state around the buggy address: [ 30.598256] ffff88801685d380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.599116] ffff88801685d400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.599967] >ffff88801685d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.600830] ^ [ 30.601579] ffff88801685d500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.602428] ffff88801685d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.603271] ================================================================== [ 30.604272] Disabling lock debugging due to kernel taint [ 32.482789] BUG: Bad rss-counter state mm:00000000ef641939 type:MM_FILEPAGES val:33 [ 32.483947] BUG: Bad rss-counter state mm:00000000ef641939 type:MM_ANONPAGES val:22 [ 32.970431] BUG: Bad rss-counter state mm:00000000ab1b55f1 type:MM_FILEPAGES val:33 [ 32.971623] BUG: Bad rss-counter state mm:00000000ab1b55f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29171' (ECDSA) to the list of known hosts. 2023/06/20 11:41:49 fuzzer started 2023/06/20 11:41:49 dialing manager at localhost:36067 2023/06/20 11:41:49 checking machine... 2023/06/20 11:41:49 checking revisions... [ 33.676614] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:41:49 testing simple program... [ 33.721295] cgroup: Unknown subsys name 'net' [ 33.782911] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:41:49 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=00007fe3f7ed3650 CR3=000000000db40000 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=2039343a31343a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a31343a3131203032 XMM08=3d656e696c646d632022656369767265 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=ffff888008c04400 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=00007f0771abffa0 CR3=000000000cbc4000 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=c9be4916a8dc319be14627aa8aacfff1 XMM02=0000000000119e58ec2efd57dc4c00df XMM03=00000000001210c8579c52780615da27 XMM04=dc6b9171927e7d7200000000000ae988 XMM05=f6469868d72ee6f60000000000131fc0 XMM06=c291bd5c70af25b90000000000131060 XMM07=e042d86d42eb936e0000000000121348 XMM08=579c52780615da270000000000119eb8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000