syzkaller login: [ 59.888248] BUG: Bad rss-counter state mm:00000000cc2be0f7 type:MM_FILEPAGES val:33 [ 59.889641] BUG: Bad rss-counter state mm:00000000cc2be0f7 type:MM_ANONPAGES val:22 [ 60.035197] ================================================================== [ 60.036305] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.037513] Read of size 8 at addr ffff88800dfa6ed8 by task sshd/220 [ 60.038621] [ 60.038885] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.039936] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.041205] Call Trace: [ 60.041607] [ 60.041945] dump_stack_lvl+0x91/0xf0 [ 60.042548] print_report+0xcc/0x620 [ 60.043138] ? __virt_addr_valid+0x102/0x340 [ 60.043808] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.044566] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.045314] kasan_report+0xbe/0xf0 [ 60.045888] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.046650] vma_interval_tree_remove+0xc75/0xec0 [ 60.047373] vma_prepare+0xc54/0x11a0 [ 60.047952] __split_vma+0x5af/0x950 [ 60.048519] ? __pfx___split_vma+0x10/0x10 [ 60.049143] ? find_held_lock+0x2c/0x110 [ 60.049782] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.050439] ? lock_is_held_type+0x9f/0x120 [ 60.050975] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.051581] ? mtree_range_walk+0x632/0x900 [ 60.052138] ? mas_walk+0x5c7/0x7c0 [ 60.052623] do_vmi_munmap+0x1f1/0x2b0 [ 60.053114] mmap_region+0x1f9/0x2660 [ 60.053612] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.054121] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.054835] ? __pfx_lock_acquire+0x10/0x10 [ 60.055369] ? __pfx_mmap_region+0x10/0x10 [ 60.055898] ? security_mmap_addr+0x7d/0xa0 [ 60.056425] ? get_unmapped_area+0x1f5/0x3f0 [ 60.056982] do_mmap+0x854/0xf00 [ 60.057450] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.057950] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.058509] ksys_mmap_pgoff+0x3af/0x500 [ 60.059018] do_syscall_64+0x3f/0x90 [ 60.059507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.060153] RIP: 0033:0x7f20830fcd82 [ 60.060608] 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 [ 60.062744] RSP: 002b:00007ffc3c4b0818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.063649] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f20830fcd82 [ 60.064489] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2082536000 [ 60.065345] RBP: 00007f2082536000 R08: 0000000000000009 R09: 0000000000001000 [ 60.066186] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d964a7f60 [ 60.067044] R13: 00007ffc3c4b0830 R14: 00007ffc3c4b0860 R15: 00007ffc3c4b0bc0 [ 60.067900] [ 60.068191] [ 60.068403] Allocated by task 213: [ 60.068835] kasan_save_stack+0x22/0x50 [ 60.069349] kasan_set_track+0x25/0x30 [ 60.069840] __kasan_slab_alloc+0x59/0x70 [ 60.070357] kmem_cache_alloc+0x16b/0x370 [ 60.070870] vm_area_dup+0x20/0x160 [ 60.071333] __split_vma+0x170/0x950 [ 60.071800] split_vma+0xc6/0x110 [ 60.072232] mprotect_fixup+0x8d2/0xb30 [ 60.072735] do_mprotect_pkey+0x87e/0xd40 [ 60.073260] __x64_sys_mprotect+0x78/0xc0 [ 60.073800] do_syscall_64+0x3f/0x90 [ 60.074271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.074904] [ 60.075117] Freed by task 213: [ 60.075510] kasan_save_stack+0x22/0x50 [ 60.076008] kasan_set_track+0x25/0x30 [ 60.076494] kasan_save_free_info+0x2b/0x50 [ 60.077045] __kasan_slab_free+0x10a/0x190 [ 60.077587] kmem_cache_free+0x10d/0x4d0 [ 60.078095] rcu_core+0x8c8/0x2860 [ 60.078536] __do_softirq+0x1b7/0x7d4 [ 60.079124] [ 60.079339] Last potentially related work creation: [ 60.079923] kasan_save_stack+0x22/0x50 [ 60.080419] __kasan_record_aux_stack+0x8e/0xa0 [ 60.080994] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.081657] remove_vma+0x139/0x170 [ 60.082100] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.082655] do_vmi_munmap+0x1f1/0x2b0 [ 60.083136] __vm_munmap+0x138/0x3a0 [ 60.083606] __x64_sys_munmap+0x59/0x80 [ 60.084098] do_syscall_64+0x3f/0x90 [ 60.084569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.085206] [ 60.085425] Second to last potentially related work creation: [ 60.086108] kasan_save_stack+0x22/0x50 [ 60.086608] __kasan_record_aux_stack+0x8e/0xa0 [ 60.087171] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.087806] remove_vma+0x139/0x170 [ 60.088252] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.088803] do_vmi_munmap+0x1f1/0x2b0 [ 60.089285] mmap_region+0x1f9/0x2660 [ 60.089761] do_mmap+0x854/0xf00 [ 60.090186] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.090675] ksys_mmap_pgoff+0x3af/0x500 [ 60.091173] do_syscall_64+0x3f/0x90 [ 60.091643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.092285] [ 60.092500] The buggy address belongs to the object at ffff88800dfa6e80 [ 60.092500] which belongs to the cache vm_area_struct of size 168 [ 60.093972] The buggy address is located 88 bytes inside of [ 60.093972] freed 168-byte region [ffff88800dfa6e80, ffff88800dfa6f28) [ 60.095367] [ 60.095581] The buggy address belongs to the physical page: [ 60.096238] page:00000000e9811312 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfa6 [ 60.097322] memcg:ffff88800c83ea01 [ 60.097748] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.098443] page_type: 0xffffffff() [ 60.098888] raw: 0100000000000200 ffff8880087a0c80 ffffea000059f500 dead000000000005 [ 60.099792] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c83ea01 [ 60.100689] page dumped because: kasan: bad access detected [ 60.101359] [ 60.101572] Memory state around the buggy address: [ 60.102154] ffff88800dfa6d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.103003] ffff88800dfa6e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 60.103850] >ffff88800dfa6e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.104689] ^ [ 60.105424] ffff88800dfa6f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 60.106275] ffff88800dfa6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 60.107142] ================================================================== [ 60.108100] Disabling lock debugging due to kernel taint [ 62.304868] BUG: Bad rss-counter state mm:0000000024a09cc6 type:MM_FILEPAGES val:33 [ 62.306036] BUG: Bad rss-counter state mm:0000000024a09cc6 type:MM_ANONPAGES val:22 [ 62.748215] BUG: Bad rss-counter state mm:00000000f9862442 type:MM_FILEPAGES val:33 [ 62.748994] BUG: Bad rss-counter state mm:00000000f9862442 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41788' (ECDSA) to the list of known hosts. 2023/06/20 21:48:45 fuzzer started 2023/06/20 21:48:46 dialing manager at localhost:36067 2023/06/20 21:48:46 checking machine... 2023/06/20 21:48:46 checking revisions... [ 63.377840] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:48:46 testing simple program... [ 63.425140] cgroup: Unknown subsys name 'net' [ 63.494636] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:48:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff860a1201 RDX=1ffff110011b3f3a RSI=ffffffff8121b48b RDI=ffff888008d9fa40 RBP=ffff888008d9fa10 RSP=ffff888008d9f970 R8 =ffffffff860a12fa R9 =ffff888008d9f9b8 R10=0000000000038001 R11=00000000000078fb R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88800eed8670 RIP=ffffffff813ad47e RFL=00000286 [--S--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 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=00007fd0b844e618 CR3=000000000c52a000 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=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=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=00007f59c8c668b0 CR3=000000000d6a2000 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=2e945f14d8836ba01b4884e53f9482e3 XMM02=2c67c8bc2e329bc3000000000011a598 XMM03=fb795ef6d65770560000000000121ad8 XMM04=bb81da1817494a3b00000000000ae988 XMM05=e4cb8bb95a7664b60000000000132ca8 XMM06=fc3015e91647dde80000000000131b10 XMM07=e042d86d42eb936e0000000000121d58 XMM08=1a0762c178450a57000000000011a5f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000