syzkaller login: [ 60.902339] BUG: Bad rss-counter state mm:000000005506c00e type:MM_FILEPAGES val:33 [ 60.903628] BUG: Bad rss-counter state mm:000000005506c00e type:MM_ANONPAGES val:22 [ 61.069676] ================================================================== [ 61.070601] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.071562] Read of size 8 at addr ffff88800dde0880 by task sshd/222 [ 61.072347] [ 61.072619] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.073538] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.074517] Call Trace: [ 61.074859] [ 61.075147] dump_stack_lvl+0x91/0xf0 [ 61.075647] print_report+0xcc/0x620 [ 61.076138] ? __virt_addr_valid+0x102/0x340 [ 61.076692] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.077311] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.077964] kasan_report+0xbe/0xf0 [ 61.078455] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.079078] vma_interval_tree_remove+0xc75/0xec0 [ 61.079699] vma_prepare+0xc54/0x11a0 [ 61.080183] __split_vma+0x5af/0x950 [ 61.080664] ? __pfx___split_vma+0x10/0x10 [ 61.081194] ? find_held_lock+0x2c/0x110 [ 61.081732] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.082296] ? lock_is_held_type+0x9f/0x120 [ 61.082846] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.083457] ? mtree_range_walk+0x632/0x900 [ 61.084008] ? mas_walk+0x5c7/0x7c0 [ 61.084486] do_vmi_munmap+0x1f1/0x2b0 [ 61.084985] mmap_region+0x1f9/0x2660 [ 61.085496] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.086008] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.086742] ? __pfx_lock_acquire+0x10/0x10 [ 61.087273] ? __pfx_mmap_region+0x10/0x10 [ 61.087810] ? security_mmap_addr+0x7d/0xa0 [ 61.088345] ? get_unmapped_area+0x1f5/0x3f0 [ 61.088910] do_mmap+0x854/0xf00 [ 61.089350] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.089858] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.090423] ksys_mmap_pgoff+0x3af/0x500 [ 61.090930] do_syscall_64+0x3f/0x90 [ 61.091411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.092061] RIP: 0033:0x7fdd67467d82 [ 61.092523] 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 [ 61.094655] RSP: 002b:00007ffe233b3f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.095576] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd67467d82 [ 61.096443] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd668a1000 [ 61.097302] RBP: 00007fdd668a1000 R08: 0000000000000009 R09: 0000000000001000 [ 61.098188] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b60f292ec0 [ 61.099049] R13: 00007ffe233b3f50 R14: 00007ffe233b3f80 R15: 00007ffe233b42e0 [ 61.099925] [ 61.100222] [ 61.100442] Allocated by task 215: [ 61.100878] kasan_save_stack+0x22/0x50 [ 61.101391] kasan_set_track+0x25/0x30 [ 61.101921] __kasan_slab_alloc+0x59/0x70 [ 61.102460] kmem_cache_alloc+0x16b/0x370 [ 61.102984] vm_area_dup+0x20/0x160 [ 61.103439] __split_vma+0x170/0x950 [ 61.103911] split_vma+0xc6/0x110 [ 61.104357] mprotect_fixup+0x8d2/0xb30 [ 61.104864] do_mprotect_pkey+0x87e/0xd40 [ 61.105392] __x64_sys_mprotect+0x78/0xc0 [ 61.105939] do_syscall_64+0x3f/0x90 [ 61.106417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.107085] [ 61.107299] Freed by task 215: [ 61.107694] kasan_save_stack+0x22/0x50 [ 61.108202] kasan_set_track+0x25/0x30 [ 61.108701] kasan_save_free_info+0x2b/0x50 [ 61.109232] __kasan_slab_free+0x10a/0x190 [ 61.109774] kmem_cache_free+0x10d/0x4d0 [ 61.110301] rcu_core+0x8c8/0x2860 [ 61.110746] __do_softirq+0x1b7/0x7d4 [ 61.111236] [ 61.111457] Last potentially related work creation: [ 61.112055] kasan_save_stack+0x22/0x50 [ 61.112566] __kasan_record_aux_stack+0x8e/0xa0 [ 61.113157] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.113806] remove_vma+0x139/0x170 [ 61.114260] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.114831] do_vmi_munmap+0x1f1/0x2b0 [ 61.115328] __vm_munmap+0x138/0x3a0 [ 61.115799] __x64_sys_munmap+0x59/0x80 [ 61.116307] do_syscall_64+0x3f/0x90 [ 61.116787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.117462] [ 61.117686] The buggy address belongs to the object at ffff88800dde0828 [ 61.117686] which belongs to the cache vm_area_struct of size 168 [ 61.119176] The buggy address is located 88 bytes inside of [ 61.119176] freed 168-byte region [ffff88800dde0828, ffff88800dde08d0) [ 61.120609] [ 61.120826] The buggy address belongs to the physical page: [ 61.121502] page:000000001e040955 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdde0 [ 61.122606] memcg:ffff88800dbedd01 [ 61.123038] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.123752] page_type: 0xffffffff() [ 61.124208] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 61.125144] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbedd01 [ 61.126067] page dumped because: kasan: bad access detected [ 61.126735] [ 61.126955] Memory state around the buggy address: [ 61.127532] ffff88800dde0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 61.128390] ffff88800dde0800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.129249] >ffff88800dde0880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.130125] ^ [ 61.130547] ffff88800dde0900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.131400] ffff88800dde0980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 61.132253] ================================================================== [ 61.133236] Disabling lock debugging due to kernel taint [ 63.148778] BUG: Bad rss-counter state mm:00000000e6bbed89 type:MM_FILEPAGES val:33 [ 63.149746] BUG: Bad rss-counter state mm:00000000e6bbed89 type:MM_ANONPAGES val:22 [ 63.523554] BUG: Bad rss-counter state mm:0000000009ecac99 type:MM_FILEPAGES val:33 [ 63.524703] BUG: Bad rss-counter state mm:0000000009ecac99 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2159' (ECDSA) to the list of known hosts. 2023/06/20 23:46:11 fuzzer started 2023/06/20 23:46:12 dialing manager at localhost:36067 2023/06/20 23:46:12 checking machine... 2023/06/20 23:46:12 checking revisions... [ 64.233909] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:46:12 testing simple program... [ 64.288443] cgroup: Unknown subsys name 'net' [ 64.351469] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:46:11 Registers: info registers vcpu 0 RAX=1ffffffff0c09d7d RBX=ffffffff8604ebe8 RCX=ffffffff8450cc7e RDX=0000000000000000 RSI=ffffffff864b2008 RDI=ffffffff8604ebc4 RBP=ffffffff8604ebe0 RSP=ffff888014607820 R8 =ffffffff864b2008 R9 =ffff888014607918 R10=0000000000038001 R11=00000000000b5080 R12=ffffffff8604ebf4 R13=ffffffff8604ebc4 R14=ffffffff8604ebdc R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f95aa346900 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=00007f834c07d650 CR3=000000000e414000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f84f43ee382a6c2700000000000ae988 XMM05=131ee987345036b70000000000132710 XMM06=00c3ffa147b8d8570000000000131500 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffe85e1f3c8 CR3=000000000e740000 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=2031313a36343a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a36343a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000