syzkaller login: [ 35.024545] BUG: Bad rss-counter state mm:00000000bab22ffc type:MM_FILEPAGES val:33 [ 35.025768] BUG: Bad rss-counter state mm:00000000bab22ffc type:MM_ANONPAGES val:22 [ 35.064364] ================================================================== [ 35.065443] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.066406] Read of size 8 at addr ffff88800970e798 by task sshd/220 [ 35.067165] [ 35.067385] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.068264] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.069243] Call Trace: [ 35.069573] [ 35.069857] dump_stack_lvl+0x91/0xf0 [ 35.070346] print_report+0xcc/0x620 [ 35.070827] ? __virt_addr_valid+0x102/0x340 [ 35.071391] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.072003] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.072619] kasan_report+0xbe/0xf0 [ 35.073095] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.073737] vma_interval_tree_remove+0xc75/0xec0 [ 35.074349] vma_prepare+0xc54/0x11a0 [ 35.074830] __split_vma+0x5af/0x950 [ 35.075302] ? __pfx___split_vma+0x10/0x10 [ 35.075837] ? find_held_lock+0x2c/0x110 [ 35.076359] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.076927] ? lock_is_held_type+0x9f/0x120 [ 35.077479] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.078083] ? mtree_range_walk+0x632/0x900 [ 35.078644] ? mas_walk+0x5c7/0x7c0 [ 35.079117] do_vmi_munmap+0x1f1/0x2b0 [ 35.079608] mmap_region+0x1f9/0x2660 [ 35.080091] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.080607] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.081333] ? __pfx_lock_acquire+0x10/0x10 [ 35.081871] ? __pfx_mmap_region+0x10/0x10 [ 35.082408] ? security_mmap_addr+0x7d/0xa0 [ 35.082940] ? get_unmapped_area+0x1f5/0x3f0 [ 35.083500] do_mmap+0x854/0xf00 [ 35.083940] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.084441] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.085000] ksys_mmap_pgoff+0x3af/0x500 [ 35.085524] do_syscall_64+0x3f/0x90 [ 35.086004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.086652] RIP: 0033:0x7f84e23b7d82 [ 35.087106] 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 [ 35.089251] RSP: 002b:00007ffe9c410198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.090191] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f84e23b7d82 [ 35.091052] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84e17f1000 [ 35.091904] RBP: 00007f84e17f1000 R08: 0000000000000009 R09: 0000000000001000 [ 35.092754] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563500616f60 [ 35.093617] R13: 00007ffe9c4101b0 R14: 00007ffe9c4101e0 R15: 00007ffe9c410540 [ 35.094487] [ 35.094778] [ 35.094995] Allocated by task 213: [ 35.095424] kasan_save_stack+0x22/0x50 [ 35.095933] kasan_set_track+0x25/0x30 [ 35.096431] __kasan_slab_alloc+0x59/0x70 [ 35.096960] kmem_cache_alloc+0x16b/0x370 [ 35.097496] vm_area_dup+0x20/0x160 [ 35.097952] __split_vma+0x170/0x950 [ 35.098423] split_vma+0xc6/0x110 [ 35.098868] mprotect_fixup+0x8d2/0xb30 [ 35.099372] do_mprotect_pkey+0x87e/0xd40 [ 35.099895] __x64_sys_mprotect+0x78/0xc0 [ 35.100421] do_syscall_64+0x3f/0x90 [ 35.100897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.101559] [ 35.101779] Freed by task 213: [ 35.102172] kasan_save_stack+0x22/0x50 [ 35.102673] kasan_set_track+0x25/0x30 [ 35.103176] kasan_save_free_info+0x2b/0x50 [ 35.103709] __kasan_slab_free+0x10a/0x190 [ 35.104236] kmem_cache_free+0x10d/0x4d0 [ 35.104748] rcu_core+0x8c8/0x2860 [ 35.105192] __do_softirq+0x1b7/0x7d4 [ 35.105681] [ 35.105896] Last potentially related work creation: [ 35.106499] kasan_save_stack+0x22/0x50 [ 35.107013] __kasan_record_aux_stack+0x8e/0xa0 [ 35.107590] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.108237] remove_vma+0x139/0x170 [ 35.108696] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.109280] do_vmi_munmap+0x1f1/0x2b0 [ 35.109772] __vm_munmap+0x138/0x3a0 [ 35.110243] __x64_sys_munmap+0x59/0x80 [ 35.110747] do_syscall_64+0x3f/0x90 [ 35.111220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.111864] [ 35.112082] Second to last potentially related work creation: [ 35.112775] kasan_save_stack+0x22/0x50 [ 35.113284] __kasan_record_aux_stack+0x8e/0xa0 [ 35.113868] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.114525] remove_vma+0x139/0x170 [ 35.114990] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.115555] do_vmi_munmap+0x1f1/0x2b0 [ 35.116043] mmap_region+0x1f9/0x2660 [ 35.116522] do_mmap+0x854/0xf00 [ 35.116954] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.117461] ksys_mmap_pgoff+0x3af/0x500 [ 35.117973] do_syscall_64+0x3f/0x90 [ 35.118451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.119103] [ 35.119324] The buggy address belongs to the object at ffff88800970e740 [ 35.119324] which belongs to the cache vm_area_struct of size 168 [ 35.120814] The buggy address is located 88 bytes inside of [ 35.120814] freed 168-byte region [ffff88800970e740, ffff88800970e7e8) [ 35.122241] [ 35.122458] The buggy address belongs to the physical page: [ 35.123122] page:000000001497a6bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x970e [ 35.124221] memcg:ffff88800d18ba01 [ 35.124648] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.125305] page_type: 0xffffffff() [ 35.125763] raw: 0100000000000200 ffff88800879fc80 ffffea0000517580 dead000000000002 [ 35.126693] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d18ba01 [ 35.127611] page dumped because: kasan: bad access detected [ 35.128277] [ 35.128491] Memory state around the buggy address: [ 35.129075] ffff88800970e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.129943] ffff88800970e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.130805] >ffff88800970e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.131666] ^ [ 35.132166] ffff88800970e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 35.133041] ffff88800970e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 35.133917] ================================================================== [ 35.135025] Disabling lock debugging due to kernel taint [ 37.097398] BUG: Bad rss-counter state mm:00000000f8b313cb type:MM_FILEPAGES val:33 [ 37.098425] BUG: Bad rss-counter state mm:00000000f8b313cb type:MM_ANONPAGES val:22 [ 37.590266] BUG: Bad rss-counter state mm:00000000a2cf369e type:MM_FILEPAGES val:33 [ 37.591435] BUG: Bad rss-counter state mm:00000000a2cf369e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33791' (ECDSA) to the list of known hosts. 2023/06/19 16:50:00 fuzzer started 2023/06/19 16:50:00 dialing manager at localhost:44161 2023/06/19 16:50:00 checking machine... 2023/06/19 16:50:00 checking revisions... [ 38.338043] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:50:00 testing simple program... [ 38.396567] cgroup: Unknown subsys name 'net' [ 38.444721] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:49:55 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=ffff888008c58000 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=00007ffc50047c68 CR3=000000001695a000 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=2039353a39343a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a39343a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008440a80 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888008440a84 RBP=1ffff11002d4fe88 RSP=ffff888016a7f438 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000287 R13=ffff888008442280 R14=ffff888008440a80 R15=ffff88806cf3d180 RIP=ffffffff812e0022 RFL=00000017 [----APC] 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 00007f291d780900 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=00007f291dd37618 CR3=000000000e96c000 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