syzkaller login: [ 31.776764] BUG: Bad rss-counter state mm:00000000bad3b2ac type:MM_FILEPAGES val:33 [ 31.778219] BUG: Bad rss-counter state mm:00000000bad3b2ac type:MM_ANONPAGES val:22 [ 31.952196] ================================================================== [ 31.953089] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.954014] Read of size 8 at addr ffff88800f238880 by task sshd/220 [ 31.954779] [ 31.955190] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.956050] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.957027] Call Trace: [ 31.957346] <TASK> [ 31.957629] dump_stack_lvl+0x91/0xf0 [ 31.958114] print_report+0xcc/0x620 [ 31.958591] ? __virt_addr_valid+0x102/0x340 [ 31.959178] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.959791] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.960408] kasan_report+0xbe/0xf0 [ 31.960892] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.961515] vma_interval_tree_remove+0xc75/0xec0 [ 31.962112] vma_prepare+0xc54/0x11a0 [ 31.962593] __split_vma+0x5af/0x950 [ 31.963070] ? __pfx___split_vma+0x10/0x10 [ 31.963598] ? find_held_lock+0x2c/0x110 [ 31.964124] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.964680] ? lock_is_held_type+0x9f/0x120 [ 31.965217] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.965820] ? mtree_range_walk+0x632/0x900 [ 31.966367] ? mas_walk+0x5c7/0x7c0 [ 31.966835] do_vmi_munmap+0x1f1/0x2b0 [ 31.967341] mmap_region+0x1f9/0x2660 [ 31.967822] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.968336] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.969043] ? __pfx_lock_acquire+0x10/0x10 [ 31.969578] ? __pfx_mmap_region+0x10/0x10 [ 31.970111] ? security_mmap_addr+0x7d/0xa0 [ 31.970638] ? get_unmapped_area+0x1f5/0x3f0 [ 31.971199] do_mmap+0x854/0xf00 [ 31.971638] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.972131] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.972686] ksys_mmap_pgoff+0x3af/0x500 [ 31.973184] do_syscall_64+0x3f/0x90 [ 31.973665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.974305] RIP: 0033:0x7fa360f59d82 [ 31.974754] 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 [ 31.976864] RSP: 002b:00007ffcbd5fbb38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.977756] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa360f59d82 [ 31.978601] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa360393000 [ 31.979453] RBP: 00007fa360393000 R08: 0000000000000009 R09: 0000000000001000 [ 31.980287] R10: 0000000000000812 R11: 0000000000000206 R12: 00005611051faec0 [ 31.981125] R13: 00007ffcbd5fbb50 R14: 00007ffcbd5fbb80 R15: 00007ffcbd5fbee0 [ 31.981973] </TASK> [ 31.982260] [ 31.982473] Allocated by task 213: [ 31.982898] kasan_save_stack+0x22/0x50 [ 31.983411] kasan_set_track+0x25/0x30 [ 31.983897] __kasan_slab_alloc+0x59/0x70 [ 31.984417] kmem_cache_alloc+0x16b/0x370 [ 31.984933] vm_area_dup+0x20/0x160 [ 31.985382] __split_vma+0x170/0x950 [ 31.985848] split_vma+0xc6/0x110 [ 31.986289] mprotect_fixup+0x8d2/0xb30 [ 31.986787] do_mprotect_pkey+0x87e/0xd40 [ 31.987318] __x64_sys_mprotect+0x78/0xc0 [ 31.987839] do_syscall_64+0x3f/0x90 [ 31.988307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.988936] [ 31.989152] Freed by task 213: [ 31.989551] kasan_save_stack+0x22/0x50 [ 31.990046] kasan_set_track+0x25/0x30 [ 31.990538] kasan_save_free_info+0x2b/0x50 [ 31.991076] __kasan_slab_free+0x10a/0x190 [ 31.991608] kmem_cache_free+0x10d/0x4d0 [ 31.992110] rcu_core+0x8c8/0x2860 [ 31.992551] __do_softirq+0x1b7/0x7d4 [ 31.993023] [ 31.993235] Last potentially related work creation: [ 31.993811] kasan_save_stack+0x22/0x50 [ 31.994311] __kasan_record_aux_stack+0x8e/0xa0 [ 31.994880] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.995540] remove_vma+0x139/0x170 [ 31.996049] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.996600] do_vmi_munmap+0x1f1/0x2b0 [ 31.997085] __vm_munmap+0x138/0x3a0 [ 31.997547] __x64_sys_munmap+0x59/0x80 [ 31.998041] do_syscall_64+0x3f/0x90 [ 31.998506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.999152] [ 31.999364] The buggy address belongs to the object at ffff88800f238828 [ 31.999364] which belongs to the cache vm_area_struct of size 168 [ 32.000821] The buggy address is located 88 bytes inside of [ 32.000821] freed 168-byte region [ffff88800f238828, ffff88800f2388d0) [ 32.002225] [ 32.002444] The buggy address belongs to the physical page: [ 32.003111] page:0000000041a09718 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf238 [ 32.004209] memcg:ffff88800e234a01 [ 32.004631] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.005277] page_type: 0xffffffff() [ 32.005721] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.006642] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e234a01 [ 32.007578] page dumped because: kasan: bad access detected [ 32.008228] [ 32.008444] Memory state around the buggy address: [ 32.009032] ffff88800f238780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.009886] ffff88800f238800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.010745] >ffff88800f238880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.011594] ^ [ 32.012002] ffff88800f238900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.012853] ffff88800f238980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.013691] ================================================================== [ 32.014597] Disabling lock debugging due to kernel taint [ 33.963764] BUG: Bad rss-counter state mm:0000000070f614b4 type:MM_FILEPAGES val:33 [ 33.964538] BUG: Bad rss-counter state mm:0000000070f614b4 type:MM_ANONPAGES val:22 [ 34.555449] BUG: Bad rss-counter state mm:00000000594d927d type:MM_FILEPAGES val:33 [ 34.556596] BUG: Bad rss-counter state mm:00000000594d927d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29856' (ECDSA) to the list of known hosts. 2023/06/20 02:15:22 fuzzer started 2023/06/20 02:15:22 dialing manager at localhost:44161 2023/06/20 02:15:23 checking machine... 2023/06/20 02:15:23 checking revisions... [ 35.222575] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:15:23 testing simple program... [ 35.277486] cgroup: Unknown subsys name 'net' [ 35.318173] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:15:21 Registers: info registers vcpu 0 RAX=ffffed1000d4ff9e RBX=ffff88806ce39518 RCX=1ffff11000d4ffa2 RDX=0000000000000000 RSI=ffffffff8451751c RDI=ffff88806ce39518 RBP=1ffff11000d4ff9e RSP=ffff888006a7fce0 R8 =ffff88801445ef00 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88806ce39518 R13=ffffffff8451751c R14=ffff888015dc1fe8 R15=ffff888015dc1b40 RIP=ffffffff812d8660 RFL=00000082 [--S----] 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 00007f49ae90d900 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=00007f49aeec2650 CR3=0000000019e6c000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff86096756 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888014717628 RSP=ffff888014717510 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff888014717630 R13=ffff888014717618 R14=ffff8880147175d0 R15=ffff8880147175d0 RIP=ffffffff81130bc1 RFL=00000282 [--S----] 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 00007fc3934d7900 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=00007fc392953d10 CR3=000000000eda8000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=af794c6a69540f0000000000000ae988 XMM05=5861d27e3d2301070000000000134bc8 XMM06=c3797bf3835431730000000000133968 XMM07=fb795ef6d65770560000000000123bd8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000