syzkaller login: [ 30.891577] BUG: Bad rss-counter state mm:000000003186b105 type:MM_FILEPAGES val:33 [ 30.893273] BUG: Bad rss-counter state mm:000000003186b105 type:MM_ANONPAGES val:22 [ 31.049043] ================================================================== [ 31.050098] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.051246] Read of size 8 at addr ffff88800cc00228 by task sshd/220 [ 31.052141] [ 31.052535] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.053572] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.054768] Call Trace: [ 31.055115] [ 31.055397] dump_stack_lvl+0x91/0xf0 [ 31.055883] print_report+0xcc/0x620 [ 31.056376] ? __virt_addr_valid+0x102/0x340 [ 31.056917] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.057532] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.058145] kasan_report+0xbe/0xf0 [ 31.058650] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.059271] vma_interval_tree_remove+0xc75/0xec0 [ 31.059868] vma_prepare+0xc54/0x11a0 [ 31.060343] __split_vma+0x5af/0x950 [ 31.060814] ? __pfx___split_vma+0x10/0x10 [ 31.061338] ? find_held_lock+0x2c/0x110 [ 31.061853] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.062419] ? lock_is_held_type+0x9f/0x120 [ 31.062978] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.063585] ? mtree_range_walk+0x632/0x900 [ 31.064138] ? mas_walk+0x5c7/0x7c0 [ 31.064608] do_vmi_munmap+0x1f1/0x2b0 [ 31.065097] mmap_region+0x1f9/0x2660 [ 31.065576] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.066084] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.066827] ? __pfx_lock_acquire+0x10/0x10 [ 31.067350] ? __pfx_mmap_region+0x10/0x10 [ 31.067874] ? security_mmap_addr+0x7d/0xa0 [ 31.068398] ? get_unmapped_area+0x1f5/0x3f0 [ 31.068938] do_mmap+0x854/0xf00 [ 31.069368] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.069863] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.070425] ksys_mmap_pgoff+0x3af/0x500 [ 31.070959] do_syscall_64+0x3f/0x90 [ 31.071431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.072075] RIP: 0033:0x7fdd157cad82 [ 31.072530] 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 [ 31.074662] RSP: 002b:00007ffc8c39cac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.075553] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd157cad82 [ 31.076388] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd14c04000 [ 31.077222] RBP: 00007fdd14c04000 R08: 0000000000000009 R09: 0000000000001000 [ 31.078061] R10: 0000000000000812 R11: 0000000000000206 R12: 00005595f9c20ec0 [ 31.078922] R13: 00007ffc8c39cae0 R14: 00007ffc8c39cb10 R15: 00007ffc8c39ce70 [ 31.079766] [ 31.080055] [ 31.080269] Allocated by task 213: [ 31.080697] kasan_save_stack+0x22/0x50 [ 31.081195] kasan_set_track+0x25/0x30 [ 31.081686] __kasan_slab_alloc+0x59/0x70 [ 31.082214] kmem_cache_alloc+0x16b/0x370 [ 31.082762] vm_area_dup+0x20/0x160 [ 31.083209] __split_vma+0x170/0x950 [ 31.083670] split_vma+0xc6/0x110 [ 31.084110] mprotect_fixup+0x8d2/0xb30 [ 31.084608] do_mprotect_pkey+0x87e/0xd40 [ 31.085133] __x64_sys_mprotect+0x78/0xc0 [ 31.085652] do_syscall_64+0x3f/0x90 [ 31.086132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.086794] [ 31.087008] Freed by task 213: [ 31.087393] kasan_save_stack+0x22/0x50 [ 31.087894] kasan_set_track+0x25/0x30 [ 31.088383] kasan_save_free_info+0x2b/0x50 [ 31.088907] __kasan_slab_free+0x10a/0x190 [ 31.089432] kmem_cache_free+0x10d/0x4d0 [ 31.089937] rcu_core+0x8c8/0x2860 [ 31.090379] __do_softirq+0x1b7/0x7d4 [ 31.090882] [ 31.091094] Last potentially related work creation: [ 31.091671] kasan_save_stack+0x22/0x50 [ 31.092169] __kasan_record_aux_stack+0x8e/0xa0 [ 31.092734] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.093380] remove_vma+0x139/0x170 [ 31.093825] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.094398] do_vmi_munmap+0x1f1/0x2b0 [ 31.094913] __vm_munmap+0x138/0x3a0 [ 31.095377] __x64_sys_munmap+0x59/0x80 [ 31.095866] do_syscall_64+0x3f/0x90 [ 31.096338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.096975] [ 31.097192] The buggy address belongs to the object at ffff88800cc001d0 [ 31.097192] which belongs to the cache vm_area_struct of size 168 [ 31.098655] The buggy address is located 88 bytes inside of [ 31.098655] freed 168-byte region [ffff88800cc001d0, ffff88800cc00278) [ 31.100039] [ 31.100256] The buggy address belongs to the physical page: [ 31.100924] page:00000000c1a77e93 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc00 [ 31.101990] memcg:ffff88800e814c01 [ 31.102415] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.103326] page_type: 0xffffffff() [ 31.103882] raw: 0100000000000200 ffff8880087a0c80 ffffea000039a000 dead000000000007 [ 31.104997] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e814c01 [ 31.106094] page dumped because: kasan: bad access detected [ 31.106926] [ 31.107184] Memory state around the buggy address: [ 31.107886] ffff88800cc00100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.108930] ffff88800cc00180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.109970] >ffff88800cc00200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.111017] ^ [ 31.111691] ffff88800cc00280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.112733] ffff88800cc00300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.113774] ================================================================== [ 31.114914] Disabling lock debugging due to kernel taint [ 33.203682] BUG: Bad rss-counter state mm:00000000b9c553e5 type:MM_FILEPAGES val:33 [ 33.204840] BUG: Bad rss-counter state mm:00000000b9c553e5 type:MM_ANONPAGES val:22 [ 33.602840] BUG: Bad rss-counter state mm:0000000077499c3b type:MM_FILEPAGES val:33 [ 33.603781] BUG: Bad rss-counter state mm:0000000077499c3b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60962' (ECDSA) to the list of known hosts. 2023/06/21 06:29:31 fuzzer started 2023/06/21 06:29:31 dialing manager at localhost:36067 2023/06/21 06:29:32 checking machine... 2023/06/21 06:29:32 checking revisions... [ 34.349130] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:29:32 testing simple program... [ 34.406275] cgroup: Unknown subsys name 'net' [ 34.449218] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:29:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffd15247368 CR3=000000000e4b4000 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=2031333a39323a3630203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a39323a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=0000000000000001 RDX=0000000000000001 RSI=00007f699ef6dc20 RDI=0000000000000000 RBP=00007fffa1d23f10 RSP=00007fffa1d239c0 R8 =0000000000000000 R9 =0000000000000003 R10=00007fffa1d23ed7 R11=0000000000000000 R12=00007fffa1d23f20 R13=00007f699ef71258 R14=00007fffa1d24060 R15=0000000000000075 RIP=00007f699ee4bbc7 RFL=00000246 [---Z-P-] 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 00007f699e9ec900 00000000 00000000 GS =0000 0000000000000000 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=00007f699efa3618 CR3=000000000ca7c000 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=25252525252525252525252525252525 XMM01=00ffffffffffff00ff0000ff0000ff00 XMM02=0000ffffffffff000000000000000000 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=7325000000000075252e75252e75252e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000