syzkaller login: [ 29.382905] BUG: Bad rss-counter state mm:000000008d3ef5cd type:MM_FILEPAGES val:33 [ 29.384351] BUG: Bad rss-counter state mm:000000008d3ef5cd type:MM_ANONPAGES val:22 [ 29.521643] ================================================================== [ 29.522545] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.523478] Read of size 8 at addr ffff88800ed27228 by task sshd/218 [ 29.524245] [ 29.524586] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.525445] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.526420] Call Trace: [ 29.526756] [ 29.527041] dump_stack_lvl+0x91/0xf0 [ 29.527529] print_report+0xcc/0x620 [ 29.528017] ? __virt_addr_valid+0x102/0x340 [ 29.528600] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.529217] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.529832] kasan_report+0xbe/0xf0 [ 29.530316] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.530943] vma_interval_tree_remove+0xc75/0xec0 [ 29.531551] vma_prepare+0xc54/0x11a0 [ 29.532037] __split_vma+0x5af/0x950 [ 29.532525] ? __pfx___split_vma+0x10/0x10 [ 29.533056] ? find_held_lock+0x2c/0x110 [ 29.533585] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.534164] ? lock_is_held_type+0x9f/0x120 [ 29.534704] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.535318] ? mtree_range_walk+0x632/0x900 [ 29.535868] ? mas_walk+0x5c7/0x7c0 [ 29.536346] do_vmi_munmap+0x1f1/0x2b0 [ 29.536849] mmap_region+0x1f9/0x2660 [ 29.537335] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.537845] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.538562] ? __pfx_lock_acquire+0x10/0x10 [ 29.539094] ? __pfx_mmap_region+0x10/0x10 [ 29.539629] ? security_mmap_addr+0x7d/0xa0 [ 29.540163] ? get_unmapped_area+0x1f5/0x3f0 [ 29.540737] do_mmap+0x854/0xf00 [ 29.541183] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.541680] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.542238] ksys_mmap_pgoff+0x3af/0x500 [ 29.542750] do_syscall_64+0x3f/0x90 [ 29.543233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.543876] RIP: 0033:0x7f4d6dc57d82 [ 29.544337] 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 [ 29.546487] RSP: 002b:00007ffd4407b278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.547395] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d6dc57d82 [ 29.548245] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d6d091000 [ 29.549100] RBP: 00007f4d6d091000 R08: 0000000000000009 R09: 0000000000001000 [ 29.549952] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a354c73ec0 [ 29.550801] R13: 00007ffd4407b290 R14: 00007ffd4407b2c0 R15: 00007ffd4407b620 [ 29.551655] [ 29.551958] [ 29.552173] Allocated by task 211: [ 29.552631] kasan_save_stack+0x22/0x50 [ 29.553142] kasan_set_track+0x25/0x30 [ 29.553640] __kasan_slab_alloc+0x59/0x70 [ 29.554169] kmem_cache_alloc+0x16b/0x370 [ 29.554686] vm_area_dup+0x20/0x160 [ 29.555142] __split_vma+0x170/0x950 [ 29.555609] split_vma+0xc6/0x110 [ 29.556051] mprotect_fixup+0x8d2/0xb30 [ 29.556572] do_mprotect_pkey+0x87e/0xd40 [ 29.557097] __x64_sys_mprotect+0x78/0xc0 [ 29.557617] do_syscall_64+0x3f/0x90 [ 29.558096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.558743] [ 29.558960] Freed by task 211: [ 29.559356] kasan_save_stack+0x22/0x50 [ 29.559860] kasan_set_track+0x25/0x30 [ 29.560360] kasan_save_free_info+0x2b/0x50 [ 29.560913] __kasan_slab_free+0x10a/0x190 [ 29.561454] kmem_cache_free+0x10d/0x4d0 [ 29.561963] rcu_core+0x8c8/0x2860 [ 29.562415] __do_softirq+0x1b7/0x7d4 [ 29.562899] [ 29.563115] Last potentially related work creation: [ 29.563706] kasan_save_stack+0x22/0x50 [ 29.564216] __kasan_record_aux_stack+0x8e/0xa0 [ 29.564807] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.565451] remove_vma+0x139/0x170 [ 29.565906] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.566475] do_vmi_munmap+0x1f1/0x2b0 [ 29.566974] __vm_munmap+0x138/0x3a0 [ 29.567440] __x64_sys_munmap+0x59/0x80 [ 29.567943] do_syscall_64+0x3f/0x90 [ 29.568423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.569088] [ 29.569305] The buggy address belongs to the object at ffff88800ed271d0 [ 29.569305] which belongs to the cache vm_area_struct of size 168 [ 29.570778] The buggy address is located 88 bytes inside of [ 29.570778] freed 168-byte region [ffff88800ed271d0, ffff88800ed27278) [ 29.572419] [ 29.572689] The buggy address belongs to the physical page: [ 29.573481] page:00000000c96c03cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed27 [ 29.574754] memcg:ffff88800ba07901 [ 29.575266] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.576082] page_type: 0xffffffff() [ 29.576768] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 29.577860] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ba07901 [ 29.578931] page dumped because: kasan: bad access detected [ 29.579718] [ 29.579976] Memory state around the buggy address: [ 29.580697] ffff88800ed27100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.581718] ffff88800ed27180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 29.582737] >ffff88800ed27200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.583754] ^ [ 29.584411] ffff88800ed27280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.585436] ffff88800ed27300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.586437] ================================================================== [ 29.587667] Disabling lock debugging due to kernel taint [ 32.331940] BUG: Bad rss-counter state mm:00000000b78db2b8 type:MM_FILEPAGES val:33 [ 32.332973] BUG: Bad rss-counter state mm:00000000b78db2b8 type:MM_ANONPAGES val:22 [ 32.863788] BUG: Bad rss-counter state mm:000000006c6c68af type:MM_FILEPAGES val:33 [ 32.864818] BUG: Bad rss-counter state mm:000000006c6c68af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26198' (ECDSA) to the list of known hosts. 2023/06/20 07:43:01 fuzzer started 2023/06/20 07:43:01 dialing manager at localhost:44161 2023/06/20 07:43:01 checking machine... 2023/06/20 07:43:01 checking revisions... [ 33.519010] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:43:01 testing simple program... [ 33.566602] cgroup: Unknown subsys name 'net' [ 33.632424] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:42:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff110028fcf97 RCX=0000000000000000 RDX=ffff8880147e8000 RSI=ffffffff83642bbc RDI=ffff8880147e7e88 RBP=0000000000000001 RSP=ffff8880147e7cb0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000040000040 R13=ffff8880147e7e60 R14=00007ffd1c3ed490 R15=0000000000000000 RIP=ffffffff83642cdc RFL=00000286 [--S--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 00007fd175397900 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=00007fd17481f830 CR3=000000000cb8a000 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=08e79dea4d6908b35f4a8ad13328089e XMM02=000000000011d3c8d59e07bde36eea69 XMM03=000000000011d4f0ec2efd57dc4c00df XMM04=ac7e0ca81f7fd74e00000000000ae988 XMM05=c795183d67f1b2d40000000000135110 XMM06=bdf2e299e47b49d50000000000133b90 XMM07=fb795ef6d657705600000000001241a0 XMM08=2c67c8bc2e329bc3000000000011d4f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88801478f408 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000a2800000a28 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b910 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 00007f79d7801900 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=00007fff80536000 CR3=000000000ef1a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000