syzkaller login: [ 31.762938] BUG: Bad rss-counter state mm:00000000b74a7a72 type:MM_FILEPAGES val:33 [ 31.764122] BUG: Bad rss-counter state mm:00000000b74a7a72 type:MM_ANONPAGES val:22 [ 31.804292] ================================================================== [ 31.805301] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.806364] Read of size 8 at addr ffff88801434d880 by task sshd/220 [ 31.807104] [ 31.807310] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.808227] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.809674] Call Trace: [ 31.810132] <TASK> [ 31.810545] dump_stack_lvl+0x91/0xf0 [ 31.811262] print_report+0xcc/0x620 [ 31.811964] ? __virt_addr_valid+0x102/0x340 [ 31.812767] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.813421] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.814002] kasan_report+0xbe/0xf0 [ 31.814461] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.815062] vma_interval_tree_remove+0xc75/0xec0 [ 31.815634] vma_prepare+0xc54/0x11a0 [ 31.816084] __split_vma+0x5af/0x950 [ 31.816537] ? __pfx___split_vma+0x10/0x10 [ 31.817035] ? find_held_lock+0x2c/0x110 [ 31.817525] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.818059] ? lock_is_held_type+0x9f/0x120 [ 31.818568] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.819171] ? mtree_range_walk+0x632/0x900 [ 31.819685] ? mas_walk+0x5c7/0x7c0 [ 31.820138] do_vmi_munmap+0x1f1/0x2b0 [ 31.820604] mmap_region+0x1f9/0x2660 [ 31.821058] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.821540] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.822217] ? __pfx_lock_acquire+0x10/0x10 [ 31.822744] ? __pfx_mmap_region+0x10/0x10 [ 31.823280] ? security_mmap_addr+0x7d/0xa0 [ 31.823809] ? get_unmapped_area+0x1f5/0x3f0 [ 31.824362] do_mmap+0x854/0xf00 [ 31.824793] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.825271] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.825832] ksys_mmap_pgoff+0x3af/0x500 [ 31.826329] do_syscall_64+0x3f/0x90 [ 31.826811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.827447] RIP: 0033:0x7f30bd923d82 [ 31.827902] 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 [ 31.830008] RSP: 002b:00007ffe01bc1458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.830934] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f30bd923d82 [ 31.831780] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f30bcd5d000 [ 31.832613] RBP: 00007f30bcd5d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.833453] R10: 0000000000000812 R11: 0000000000000206 R12: 00005567b294ab20 [ 31.834292] R13: 00007ffe01bc1470 R14: 00007ffe01bc14a0 R15: 00007ffe01bc1800 [ 31.835144] </TASK> [ 31.835428] [ 31.835640] Allocated by task 213: [ 31.836062] kasan_save_stack+0x22/0x50 [ 31.836552] kasan_set_track+0x25/0x30 [ 31.837049] __kasan_slab_alloc+0x59/0x70 [ 31.837569] kmem_cache_alloc+0x16b/0x370 [ 31.838081] vm_area_dup+0x20/0x160 [ 31.838530] __split_vma+0x170/0x950 [ 31.839004] split_vma+0xc6/0x110 [ 31.839438] mprotect_fixup+0x8d2/0xb30 [ 31.839936] do_mprotect_pkey+0x87e/0xd40 [ 31.840447] __x64_sys_mprotect+0x78/0xc0 [ 31.840974] do_syscall_64+0x3f/0x90 [ 31.841438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.842068] [ 31.842275] Freed by task 213: [ 31.842659] kasan_save_stack+0x22/0x50 [ 31.843163] kasan_set_track+0x25/0x30 [ 31.843647] kasan_save_free_info+0x2b/0x50 [ 31.844170] __kasan_slab_free+0x10a/0x190 [ 31.844703] kmem_cache_free+0x10d/0x4d0 [ 31.845212] rcu_core+0x8c8/0x2860 [ 31.845646] __do_softirq+0x1b7/0x7d4 [ 31.846111] [ 31.846322] Last potentially related work creation: [ 31.846901] kasan_save_stack+0x22/0x50 [ 31.847405] __kasan_record_aux_stack+0x8e/0xa0 [ 31.847971] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.848607] remove_vma+0x139/0x170 [ 31.849135] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.849683] do_vmi_munmap+0x1f1/0x2b0 [ 31.850167] __vm_munmap+0x138/0x3a0 [ 31.850620] __x64_sys_munmap+0x59/0x80 [ 31.851122] do_syscall_64+0x3f/0x90 [ 31.851594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.852234] [ 31.852445] The buggy address belongs to the object at ffff88801434d828 [ 31.852445] which belongs to the cache vm_area_struct of size 168 [ 31.853891] The buggy address is located 88 bytes inside of [ 31.853891] freed 168-byte region [ffff88801434d828, ffff88801434d8d0) [ 31.855296] [ 31.855518] The buggy address belongs to the physical page: [ 31.856184] page:00000000dd0f39b2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1434d [ 31.857275] memcg:ffff88800e655b01 [ 31.857696] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.858325] page_type: 0xffffffff() [ 31.858771] raw: 0100000000000200 ffff88800879fc80 ffffea00003fa700 dead000000000004 [ 31.859699] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e655b01 [ 31.860605] page dumped because: kasan: bad access detected [ 31.861267] [ 31.861478] Memory state around the buggy address: [ 31.862052] ffff88801434d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.862889] ffff88801434d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.863738] >ffff88801434d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.864587] ^ [ 31.864988] ffff88801434d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.865834] ffff88801434d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.866672] ================================================================== [ 31.867704] Disabling lock debugging due to kernel taint [ 34.123580] BUG: Bad rss-counter state mm:00000000f2233bba type:MM_FILEPAGES val:33 [ 34.124776] BUG: Bad rss-counter state mm:00000000f2233bba type:MM_ANONPAGES val:22 [ 34.599384] BUG: Bad rss-counter state mm:0000000045f51302 type:MM_FILEPAGES val:33 [ 34.600534] BUG: Bad rss-counter state mm:0000000045f51302 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14753' (ECDSA) to the list of known hosts. 2023/06/20 05:35:26 fuzzer started 2023/06/20 05:35:26 dialing manager at localhost:44161 2023/06/20 05:35:26 checking machine... 2023/06/20 05:35:26 checking revisions... [ 35.216951] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:35:27 testing simple program... [ 35.266928] cgroup: Unknown subsys name 'net' [ 35.312786] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:35:25 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffd78d13f58 CR3=0000000005482000 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=00007f250469a510000055725f9f2790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffed100d9e13a4 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806cf09d10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8fe1 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 00007f5ce0457900 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=00007f5ce0a0e618 CR3=000000000e7e8000 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