syzkaller login: [ 30.874556] BUG: Bad rss-counter state mm:000000006aac12e1 type:MM_FILEPAGES val:33 [ 30.875633] BUG: Bad rss-counter state mm:000000006aac12e1 type:MM_ANONPAGES val:22 [ 31.052807] ================================================================== [ 31.053894] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.055042] Read of size 8 at addr ffff88800e9ed3f8 by task sshd/220 [ 31.055995] [ 31.056231] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.057149] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.058225] Call Trace: [ 31.058564] [ 31.058867] dump_stack_lvl+0x91/0xf0 [ 31.059396] print_report+0xcc/0x620 [ 31.059917] ? __virt_addr_valid+0x102/0x340 [ 31.060504] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.061176] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.061835] kasan_report+0xbe/0xf0 [ 31.062356] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.062982] vma_interval_tree_remove+0xc75/0xec0 [ 31.063591] vma_prepare+0xc54/0x11a0 [ 31.064075] __split_vma+0x5af/0x950 [ 31.064557] ? __pfx___split_vma+0x10/0x10 [ 31.065098] ? find_held_lock+0x2c/0x110 [ 31.065627] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.066225] ? lock_is_held_type+0x9f/0x120 [ 31.066770] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.067384] ? mtree_range_walk+0x632/0x900 [ 31.067950] ? mas_walk+0x5c7/0x7c0 [ 31.068436] do_vmi_munmap+0x1f1/0x2b0 [ 31.068934] mmap_region+0x1f9/0x2660 [ 31.069422] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.069947] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.070668] ? __pfx_lock_acquire+0x10/0x10 [ 31.071220] ? __pfx_mmap_region+0x10/0x10 [ 31.071788] ? security_mmap_addr+0x7d/0xa0 [ 31.072342] ? get_unmapped_area+0x1f5/0x3f0 [ 31.072920] do_mmap+0x854/0xf00 [ 31.073386] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.073938] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.074540] ksys_mmap_pgoff+0x3af/0x500 [ 31.075082] do_syscall_64+0x3f/0x90 [ 31.075593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.076271] RIP: 0033:0x7faca04f1d82 [ 31.076755] 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 [ 31.079017] RSP: 002b:00007ffc15b0a258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.079981] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faca04f1d82 [ 31.080880] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac9f92b000 [ 31.081766] RBP: 00007fac9f92b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.082674] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f1621dbec0 [ 31.083572] R13: 00007ffc15b0a270 R14: 00007ffc15b0a2a0 R15: 00007ffc15b0a600 [ 31.084489] [ 31.084795] [ 31.085023] Allocated by task 213: [ 31.085475] kasan_save_stack+0x22/0x50 [ 31.086032] kasan_set_track+0x25/0x30 [ 31.086556] __kasan_slab_alloc+0x59/0x70 [ 31.087117] kmem_cache_alloc+0x16b/0x370 [ 31.087670] vm_area_dup+0x20/0x160 [ 31.088155] __split_vma+0x170/0x950 [ 31.088647] split_vma+0xc6/0x110 [ 31.089107] mprotect_fixup+0x8d2/0xb30 [ 31.089633] do_mprotect_pkey+0x87e/0xd40 [ 31.090191] __x64_sys_mprotect+0x78/0xc0 [ 31.090736] do_syscall_64+0x3f/0x90 [ 31.091248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.091922] [ 31.092150] Freed by task 213: [ 31.092567] kasan_save_stack+0x22/0x50 [ 31.093098] kasan_set_track+0x25/0x30 [ 31.093621] kasan_save_free_info+0x2b/0x50 [ 31.094210] __kasan_slab_free+0x10a/0x190 [ 31.094779] kmem_cache_free+0x10d/0x4d0 [ 31.095318] rcu_core+0x8c8/0x2860 [ 31.095791] __do_softirq+0x1b7/0x7d4 [ 31.096296] [ 31.096591] Last potentially related work creation: [ 31.097213] kasan_save_stack+0x22/0x50 [ 31.097742] __kasan_record_aux_stack+0x8e/0xa0 [ 31.098353] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.099034] remove_vma+0x139/0x170 [ 31.099505] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.100108] do_vmi_munmap+0x1f1/0x2b0 [ 31.100622] __vm_munmap+0x138/0x3a0 [ 31.101125] __x64_sys_munmap+0x59/0x80 [ 31.101656] do_syscall_64+0x3f/0x90 [ 31.102174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.102859] [ 31.103084] The buggy address belongs to the object at ffff88800e9ed3a0 [ 31.103084] which belongs to the cache vm_area_struct of size 168 [ 31.104636] The buggy address is located 88 bytes inside of [ 31.104636] freed 168-byte region [ffff88800e9ed3a0, ffff88800e9ed448) [ 31.106134] [ 31.106358] The buggy address belongs to the physical page: [ 31.107052] page:000000009cc1b5ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9ed [ 31.108176] memcg:ffff88800ee82601 [ 31.108622] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.109296] page_type: 0xffffffff() [ 31.109768] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.110746] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee82601 [ 31.111695] page dumped because: kasan: bad access detected [ 31.112394] [ 31.112619] Memory state around the buggy address: [ 31.113239] ffff88800e9ed280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.114145] ffff88800e9ed300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.115047] >ffff88800e9ed380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.115939] ^ [ 31.116825] ffff88800e9ed400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.117723] ffff88800e9ed480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.118645] ================================================================== [ 31.119612] Disabling lock debugging due to kernel taint [ 33.026644] BUG: Bad rss-counter state mm:000000004dca78ac type:MM_FILEPAGES val:33 [ 33.027400] BUG: Bad rss-counter state mm:000000004dca78ac type:MM_ANONPAGES val:22 [ 33.578345] BUG: Bad rss-counter state mm:00000000ad9c1fa4 type:MM_FILEPAGES val:33 [ 33.579604] BUG: Bad rss-counter state mm:00000000ad9c1fa4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21114' (ECDSA) to the list of known hosts. 2023/06/20 22:42:05 fuzzer started 2023/06/20 22:42:06 dialing manager at localhost:36067 2023/06/20 22:42:06 checking machine... 2023/06/20 22:42:06 checking revisions... [ 34.225310] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:42:06 testing simple program... [ 34.267406] cgroup: Unknown subsys name 'net' [ 34.313612] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:42:05 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000008 RCX=0000000000000000 RDX=ffff88800dcb8000 RSI=ffffffff84900ca0 RDI=0000000000000002 RBP=ffff88800e3ffa3c RSP=ffff88800e3ff8f0 R8 =0000000000000007 R9 =0000000000000010 R10=ffff88800e3ffa34 R11=0000000000000000 R12=ffff88800e3ffa34 R13=0000000000000000 R14=0000000000000002 R15=ffff88800e3ffa34 RIP=ffffffff814c046a RFL=00000293 [--S-A-C] 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 00007fe8e7e83700 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=00007fcd6802f0b0 CR3=00000000159f8000 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=32343a3232203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383831 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=0000000000000001 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=00007fe897647400 CR3=00000000094d6000 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=3f85b5db39a863b4bc4dbffe178253b9 XMM02=000000000011b830eff9b2d0a8fce9cb XMM03=000000000011b9002c67c8bc2e329bc3 XMM04=da62dcf233e673bb00000000000ae988 XMM05=19e9129bd510f2350000000000132100 XMM06=3d4eb7fc4f4506560000000000130f68 XMM07=e042d86d42eb936e00000000001224f8 XMM08=834a2139984987bd000000000011b900 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000