syzkaller login: [ 30.948458] BUG: Bad rss-counter state mm:00000000815b176e type:MM_FILEPAGES val:33 [ 30.949361] BUG: Bad rss-counter state mm:00000000815b176e type:MM_ANONPAGES val:22 [ 31.060053] ================================================================== [ 31.060714] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.061377] Read of size 8 at addr ffff88800fcde140 by task sshd/220 [ 31.061924] [ 31.062081] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.062727] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.063404] Call Trace: [ 31.063631] [ 31.063833] dump_stack_lvl+0x91/0xf0 [ 31.064180] print_report+0xcc/0x620 [ 31.064781] ? __virt_addr_valid+0x102/0x340 [ 31.065186] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.065629] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.066070] kasan_report+0xbe/0xf0 [ 31.066410] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.066901] vma_interval_tree_remove+0xc75/0xec0 [ 31.067328] vma_prepare+0xc54/0x11a0 [ 31.067671] __split_vma+0x5af/0x950 [ 31.068003] ? __pfx___split_vma+0x10/0x10 [ 31.068374] ? find_held_lock+0x2c/0x110 [ 31.068744] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.069154] ? lock_is_held_type+0x9f/0x120 [ 31.069538] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.069974] ? mtree_range_walk+0x632/0x900 [ 31.070370] ? mas_walk+0x5c7/0x7c0 [ 31.070743] do_vmi_munmap+0x1f1/0x2b0 [ 31.071094] mmap_region+0x1f9/0x2660 [ 31.071456] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.071821] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.072330] ? __pfx_lock_acquire+0x10/0x10 [ 31.072708] ? __pfx_mmap_region+0x10/0x10 [ 31.073094] ? security_mmap_addr+0x7d/0xa0 [ 31.073472] ? get_unmapped_area+0x1f5/0x3f0 [ 31.073872] do_mmap+0x854/0xf00 [ 31.074187] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.074536] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.074958] ksys_mmap_pgoff+0x3af/0x500 [ 31.075320] do_syscall_64+0x3f/0x90 [ 31.075665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.076125] RIP: 0033:0x7f519f493d82 [ 31.076464] 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 [ 31.077981] RSP: 002b:00007ffe01b78548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.078671] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f519f493d82 [ 31.079289] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f519e8cd000 [ 31.079910] RBP: 00007f519e8cd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.080511] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d947c1fec0 [ 31.081121] R13: 00007ffe01b78560 R14: 00007ffe01b78590 R15: 00007ffe01b788f0 [ 31.081735] [ 31.081944] [ 31.082097] Allocated by task 213: [ 31.082407] kasan_save_stack+0x22/0x50 [ 31.082790] kasan_set_track+0x25/0x30 [ 31.083144] __kasan_slab_alloc+0x59/0x70 [ 31.083520] kmem_cache_alloc+0x16b/0x370 [ 31.083888] vm_area_dup+0x20/0x160 [ 31.084214] __split_vma+0x170/0x950 [ 31.084549] split_vma+0xc6/0x110 [ 31.084866] mprotect_fixup+0x8d2/0xb30 [ 31.085228] do_mprotect_pkey+0x87e/0xd40 [ 31.085603] __x64_sys_mprotect+0x78/0xc0 [ 31.085973] do_syscall_64+0x3f/0x90 [ 31.086326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.086815] [ 31.086970] Freed by task 213: [ 31.087260] kasan_save_stack+0x22/0x50 [ 31.087617] kasan_set_track+0x25/0x30 [ 31.087966] kasan_save_free_info+0x2b/0x50 [ 31.088351] __kasan_slab_free+0x10a/0x190 [ 31.088733] kmem_cache_free+0x10d/0x4d0 [ 31.089094] rcu_core+0x8c8/0x2860 [ 31.089410] __do_softirq+0x1b7/0x7d4 [ 31.089753] [ 31.089909] Last potentially related work creation: [ 31.090323] kasan_save_stack+0x22/0x50 [ 31.090708] __kasan_record_aux_stack+0x8e/0xa0 [ 31.091122] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.091579] remove_vma+0x139/0x170 [ 31.091900] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.092298] do_vmi_munmap+0x1f1/0x2b0 [ 31.092646] __vm_munmap+0x138/0x3a0 [ 31.092981] __x64_sys_munmap+0x59/0x80 [ 31.093357] do_syscall_64+0x3f/0x90 [ 31.093701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.094168] [ 31.094326] The buggy address belongs to the object at ffff88800fcde0e8 [ 31.094326] which belongs to the cache vm_area_struct of size 168 [ 31.095396] The buggy address is located 88 bytes inside of [ 31.095396] freed 168-byte region [ffff88800fcde0e8, ffff88800fcde190) [ 31.096403] [ 31.096558] The buggy address belongs to the physical page: [ 31.097025] page:000000003122d5f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcde [ 31.097806] memcg:ffff88800b829201 [ 31.098108] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.098592] page_type: 0xffffffff() [ 31.098921] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.099571] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b829201 [ 31.100216] page dumped because: kasan: bad access detected [ 31.100696] [ 31.100852] Memory state around the buggy address: [ 31.101275] ffff88800fcde000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.101897] ffff88800fcde080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.102511] >ffff88800fcde100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.103129] ^ [ 31.103586] ffff88800fcde180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.104197] ffff88800fcde200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.104806] ================================================================== [ 31.105547] Disabling lock debugging due to kernel taint [ 32.694174] BUG: Bad rss-counter state mm:0000000099b5ccab type:MM_FILEPAGES val:33 [ 32.694874] BUG: Bad rss-counter state mm:0000000099b5ccab type:MM_ANONPAGES val:22 [ 33.083325] BUG: Bad rss-counter state mm:0000000087916e96 type:MM_FILEPAGES val:33 [ 33.084037] BUG: Bad rss-counter state mm:0000000087916e96 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22752' (ECDSA) to the list of known hosts. 2023/06/21 09:08:43 fuzzer started 2023/06/21 09:08:43 dialing manager at localhost:36067 2023/06/21 09:08:43 checking machine... 2023/06/21 09:08:43 checking revisions... [ 33.633819] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:08:43 testing simple program... [ 33.675669] cgroup: Unknown subsys name 'net' [ 33.723104] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:08:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b2f26 RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff864b2f28 RBP=ffff88801466fa30 RSP=ffff88801466f968 R8 =0000000000000001 R9 =ffff88801466fa18 R10=0000000000038001 R11=00000000000b5305 R12=ffff88801466fa38 R13=ffff88801466fa20 R14=ffff88801466ff58 R15=ffff88801466f9d8 RIP=ffffffff81131204 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7e3dbac900 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=00007f7e3cfe4e30 CR3=0000000008ecc000 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=5e5c10884646930b000000000010f210 XMM01=2fb250725213ee9fe54f5b9ca165142d XMM02=ec2efd57dc4c00df000000000011ad58 XMM03=70a749a865df1d44000000000011ae28 XMM04=52b0afa2488ad2c200000000000ae988 XMM05=9542067a4a4d72e000000000001327c0 XMM06=19e9129bd510f2350000000000131908 XMM07=fb795ef6d65770560000000000121a98 XMM08=2c67c8bc2e329bc3000000000011adc8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=ffff88800d6976c8 RSI=0000000000000000 RDI=ffff88800d697380 RBP=ffff88800d697408 RSP=ffff88800d697368 R8 =ffffffff86138e90 R9 =ffff88800d6973b0 R10=0000000000038001 R11=0000000000020d8f R12=ffff88800d697438 R13=0000000000000000 R14=ffff888015d1b680 R15=0000000000002000 RIP=ffffffff81130939 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 00007f6aee050900 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=00007f6aee607618 CR3=000000000e692000 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=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