syzkaller login: [ 31.879589] BUG: Bad rss-counter state mm:00000000294f7f5e type:MM_FILEPAGES val:33 [ 31.881515] BUG: Bad rss-counter state mm:00000000294f7f5e type:MM_ANONPAGES val:22 [ 32.038599] ================================================================== [ 32.039522] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.040465] Read of size 8 at addr ffff888017fb9d08 by task sshd/220 [ 32.041241] [ 32.041556] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.042426] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.043404] Call Trace: [ 32.043727] [ 32.044014] dump_stack_lvl+0x91/0xf0 [ 32.044509] print_report+0xcc/0x620 [ 32.045035] ? __virt_addr_valid+0x102/0x340 [ 32.045596] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.046223] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.046847] kasan_report+0xbe/0xf0 [ 32.047328] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.047956] vma_interval_tree_remove+0xc75/0xec0 [ 32.048596] vma_prepare+0xc54/0x11a0 [ 32.049110] __split_vma+0x5af/0x950 [ 32.049614] ? __pfx___split_vma+0x10/0x10 [ 32.050178] ? find_held_lock+0x2c/0x110 [ 32.050730] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.051325] ? lock_is_held_type+0x9f/0x120 [ 32.051905] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.052542] ? mtree_range_walk+0x632/0x900 [ 32.053149] ? mas_walk+0x5c7/0x7c0 [ 32.053649] do_vmi_munmap+0x1f1/0x2b0 [ 32.054176] mmap_region+0x1f9/0x2660 [ 32.054684] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.055224] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.055970] ? __pfx_lock_acquire+0x10/0x10 [ 32.056541] ? __pfx_mmap_region+0x10/0x10 [ 32.057117] ? security_mmap_addr+0x7d/0xa0 [ 32.057690] ? get_unmapped_area+0x1f5/0x3f0 [ 32.058276] do_mmap+0x854/0xf00 [ 32.058774] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.059300] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.059900] ksys_mmap_pgoff+0x3af/0x500 [ 32.060447] do_syscall_64+0x3f/0x90 [ 32.060956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.061642] RIP: 0033:0x7faac470ed82 [ 32.062129] 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 [ 32.064409] RSP: 002b:00007ffdf3fd75b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.065411] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faac470ed82 [ 32.066322] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faac3b48000 [ 32.067243] RBP: 00007faac3b48000 R08: 0000000000000009 R09: 0000000000001000 [ 32.068149] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d93abf0b20 [ 32.069066] R13: 00007ffdf3fd75d0 R14: 00007ffdf3fd7600 R15: 00007ffdf3fd7960 [ 32.069989] [ 32.070300] [ 32.070536] Allocated by task 213: [ 32.070996] kasan_save_stack+0x22/0x50 [ 32.071540] kasan_set_track+0x25/0x30 [ 32.072058] __kasan_slab_alloc+0x59/0x70 [ 32.072622] kmem_cache_alloc+0x16b/0x370 [ 32.073168] vm_area_dup+0x20/0x160 [ 32.073656] __split_vma+0x170/0x950 [ 32.074155] split_vma+0xc6/0x110 [ 32.074624] mprotect_fixup+0x8d2/0xb30 [ 32.075163] do_mprotect_pkey+0x87e/0xd40 [ 32.075715] __x64_sys_mprotect+0x78/0xc0 [ 32.076264] do_syscall_64+0x3f/0x90 [ 32.076777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.077465] [ 32.077700] Freed by task 213: [ 32.078119] kasan_save_stack+0x22/0x50 [ 32.078672] kasan_set_track+0x25/0x30 [ 32.079199] kasan_save_free_info+0x2b/0x50 [ 32.079760] __kasan_slab_free+0x10a/0x190 [ 32.080325] kmem_cache_free+0x10d/0x4d0 [ 32.080877] rcu_core+0x8c8/0x2860 [ 32.081348] __do_softirq+0x1b7/0x7d4 [ 32.081860] [ 32.082092] Last potentially related work creation: [ 32.082724] kasan_save_stack+0x22/0x50 [ 32.083265] __kasan_record_aux_stack+0x8e/0xa0 [ 32.083867] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.084557] remove_vma+0x139/0x170 [ 32.085056] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.085645] do_vmi_munmap+0x1f1/0x2b0 [ 32.086171] __vm_munmap+0x138/0x3a0 [ 32.086662] __x64_sys_munmap+0x59/0x80 [ 32.087186] do_syscall_64+0x3f/0x90 [ 32.087686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.088375] [ 32.088617] The buggy address belongs to the object at ffff888017fb9cb0 [ 32.088617] which belongs to the cache vm_area_struct of size 168 [ 32.090199] The buggy address is located 88 bytes inside of [ 32.090199] freed 168-byte region [ffff888017fb9cb0, ffff888017fb9d58) [ 32.091704] [ 32.091935] The buggy address belongs to the physical page: [ 32.092641] page:0000000094c70822 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17fb9 [ 32.093789] memcg:ffff88800ca05401 [ 32.094247] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.094937] page_type: 0xffffffff() [ 32.095419] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.096406] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca05401 [ 32.097414] page dumped because: kasan: bad access detected [ 32.098130] [ 32.098363] Memory state around the buggy address: [ 32.098994] ffff888017fb9c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.099911] ffff888017fb9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.100835] >ffff888017fb9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.101745] ^ [ 32.102213] ffff888017fb9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.103122] ffff888017fb9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.104036] ================================================================== [ 32.105156] Disabling lock debugging due to kernel taint [ 34.480663] BUG: Bad rss-counter state mm:00000000f1de3866 type:MM_FILEPAGES val:33 [ 34.481844] BUG: Bad rss-counter state mm:00000000f1de3866 type:MM_ANONPAGES val:22 [ 35.069430] BUG: Bad rss-counter state mm:00000000c376e7d7 type:MM_FILEPAGES val:33 [ 35.070621] BUG: Bad rss-counter state mm:00000000c376e7d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38457' (ECDSA) to the list of known hosts. 2023/06/19 17:56:56 fuzzer started 2023/06/19 17:56:56 dialing manager at localhost:44161 2023/06/19 17:56:56 checking machine... 2023/06/19 17:56:56 checking revisions... [ 35.748259] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:56:57 testing simple program... [ 35.802339] cgroup: Unknown subsys name 'net' [ 35.856757] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:56:55 Registers: info registers vcpu 0 RAX=000055858f5e5b20 RBX=000055858f602f80 RCX=0000000000000a23 RDX=0000000000000002 RSI=000055858f6111c4 RDI=000055858f5e5b20 RBP=00007fffd62bb440 RSP=00007fffd62bb3d8 R8 =000055858f6111c4 R9 =00007f42af40dbe0 R10=000000000000006f R11=0000000000000246 R12=0000000000000002 R13=000055858f6111c5 R14=0000000000000002 R15=0000000000000000 RIP=00007f42af3b1b69 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f42aee5b900 00000000 00000000 GS =0000 0000000000000000 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=00007f42af410650 CR3=000000000b9b4000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=0000000000000000000000000000ff00 XMM02=00000000000000ffff00000000000000 XMM03=41206575725420656e4f206f6e207369 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000000000000000ffffffffffffff XMM08=6e4f206f6e207300002e646e696d2023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff860d68f6 RDX=1ffff1100d9e1356 RSI=1ffff1100d9e1355 RDI=1ffff1100d9e1355 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff860d68fa R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09b88 R15=ffff88806cf09a50 RIP=ffffffff811310d4 RFL=00000246 [---Z-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 00007efdd3bbf900 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=00007efdd2fb6580 CR3=000000000d4aa000 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=ee15479a6c078f96ed4906ef6417e23c XMM02=000000000011daa0eff9b2d0a8fce9cb XMM03=000000000011db702c67c8bc2e329bc3 XMM04=909276b5c91a357700000000000ae988 XMM05=17837d58c6e6bd100000000000135940 XMM06=19e9129bd510f23500000000001347a0 XMM07=fb795ef6d65770560000000000124c20 XMM08=2c67c8bc2e329bc3000000000011db10 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000