syzkaller login: [ 30.870729] BUG: Bad rss-counter state mm:000000009689028d type:MM_FILEPAGES val:33 [ 30.872016] BUG: Bad rss-counter state mm:000000009689028d type:MM_ANONPAGES val:22 [ 31.044950] ================================================================== [ 31.045998] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.047039] Read of size 8 at addr ffff888016c6a798 by task sshd/221 [ 31.048302] [ 31.048544] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.049506] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.050593] Call Trace: [ 31.050959] [ 31.051274] dump_stack_lvl+0x91/0xf0 [ 31.051824] print_report+0xcc/0x620 [ 31.052371] ? __virt_addr_valid+0x102/0x340 [ 31.052992] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.053667] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.054365] kasan_report+0xbe/0xf0 [ 31.054899] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.055578] vma_interval_tree_remove+0xc75/0xec0 [ 31.056282] vma_prepare+0xc54/0x11a0 [ 31.056831] __split_vma+0x5af/0x950 [ 31.057352] ? __pfx___split_vma+0x10/0x10 [ 31.057985] ? find_held_lock+0x2c/0x110 [ 31.058665] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.059301] ? lock_is_held_type+0x9f/0x120 [ 31.059913] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.060599] ? mtree_range_walk+0x632/0x900 [ 31.061221] ? mas_walk+0x5c7/0x7c0 [ 31.061745] do_vmi_munmap+0x1f1/0x2b0 [ 31.062319] mmap_region+0x1f9/0x2660 [ 31.062860] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.063416] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.064237] ? __pfx_lock_acquire+0x10/0x10 [ 31.064844] ? __pfx_mmap_region+0x10/0x10 [ 31.065426] ? security_mmap_addr+0x7d/0xa0 [ 31.066044] ? get_unmapped_area+0x1f5/0x3f0 [ 31.066645] do_mmap+0x854/0xf00 [ 31.067146] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.067687] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.068338] ksys_mmap_pgoff+0x3af/0x500 [ 31.068922] do_syscall_64+0x3f/0x90 [ 31.069449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.070190] RIP: 0033:0x7fcf343ded82 [ 31.070693] 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 [ 31.073093] RSP: 002b:00007fffe275afe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.074121] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf343ded82 [ 31.075070] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf33818000 [ 31.076017] RBP: 00007fcf33818000 R08: 0000000000000009 R09: 0000000000001000 [ 31.076970] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561a9e461ec0 [ 31.077919] R13: 00007fffe275b000 R14: 00007fffe275b030 R15: 00007fffe275b390 [ 31.078881] [ 31.079199] [ 31.079434] Allocated by task 214: [ 31.079918] kasan_save_stack+0x22/0x50 [ 31.080499] kasan_set_track+0x25/0x30 [ 31.081060] __kasan_slab_alloc+0x59/0x70 [ 31.081634] kmem_cache_alloc+0x16b/0x370 [ 31.082234] vm_area_dup+0x20/0x160 [ 31.082737] __split_vma+0x170/0x950 [ 31.083264] split_vma+0xc6/0x110 [ 31.083745] mprotect_fixup+0x8d2/0xb30 [ 31.084323] do_mprotect_pkey+0x87e/0xd40 [ 31.084911] __x64_sys_mprotect+0x78/0xc0 [ 31.085481] do_syscall_64+0x3f/0x90 [ 31.086032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.086739] [ 31.086992] Freed by task 214: [ 31.087424] kasan_save_stack+0x22/0x50 [ 31.088014] kasan_set_track+0x25/0x30 [ 31.088559] kasan_save_free_info+0x2b/0x50 [ 31.089336] __kasan_slab_free+0x10a/0x190 [ 31.089986] kmem_cache_free+0x10d/0x4d0 [ 31.090546] rcu_core+0x8c8/0x2860 [ 31.091045] __do_softirq+0x1b7/0x7d4 [ 31.091564] [ 31.091809] Last potentially related work creation: [ 31.092463] kasan_save_stack+0x22/0x50 [ 31.093031] __kasan_record_aux_stack+0x8e/0xa0 [ 31.093655] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.094383] remove_vma+0x139/0x170 [ 31.094895] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.095502] do_vmi_munmap+0x1f1/0x2b0 [ 31.096064] __vm_munmap+0x138/0x3a0 [ 31.096577] __x64_sys_munmap+0x59/0x80 [ 31.097138] do_syscall_64+0x3f/0x90 [ 31.097659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.098395] [ 31.098631] The buggy address belongs to the object at ffff888016c6a740 [ 31.098631] which belongs to the cache vm_area_struct of size 168 [ 31.100300] The buggy address is located 88 bytes inside of [ 31.100300] freed 168-byte region [ffff888016c6a740, ffff888016c6a7e8) [ 31.101866] [ 31.102103] The buggy address belongs to the physical page: [ 31.102838] page:00000000cfa8caf8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c6a [ 31.104064] memcg:ffff8880068ad001 [ 31.104538] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.105259] page_type: 0xffffffff() [ 31.105757] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.106799] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880068ad001 [ 31.107815] page dumped because: kasan: bad access detected [ 31.108568] [ 31.108817] Memory state around the buggy address: [ 31.109455] ffff888016c6a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.110413] ffff888016c6a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.111365] >ffff888016c6a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.112329] ^ [ 31.112890] ffff888016c6a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.113845] ffff888016c6a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.114797] ================================================================== [ 31.116078] Disabling lock debugging due to kernel taint [ 33.289161] BUG: Bad rss-counter state mm:00000000447f8370 type:MM_FILEPAGES val:33 [ 33.290571] BUG: Bad rss-counter state mm:00000000447f8370 type:MM_ANONPAGES val:22 [ 33.716841] BUG: Bad rss-counter state mm:000000009c409662 type:MM_FILEPAGES val:33 [ 33.717874] BUG: Bad rss-counter state mm:000000009c409662 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43469' (ECDSA) to the list of known hosts. 2023/06/21 10:47:01 fuzzer started 2023/06/21 10:47:01 dialing manager at localhost:36067 2023/06/21 10:47:02 checking machine... 2023/06/21 10:47:02 checking revisions... [ 34.540792] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:47:02 testing simple program... [ 34.598080] cgroup: Unknown subsys name 'net' [ 34.666231] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:47:01 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff81370a89 RDX=000000000000370a RSI=000000000000370a RDI=ffffffff864f7618 RBP=ffff88800c47f8d8 RSP=ffff88800c47f810 R8 =0000000000000000 R9 =ffff88800c47f8c0 R10=0000000000038001 R11=000000000000fc0c R12=ffff88800c47f8e0 R13=ffff88800c47f8c8 R14=ffff88800c47f8c1 R15=ffff88800c47f880 RIP=ffffffff811307c2 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 00007fd77cc2a900 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=00007fd77d1df650 CR3=0000000016456000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffdbba3e558 CR3=000000001945c000 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=37343a3031203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732031303a3734 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343830 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000