syzkaller login: [ 28.933251] BUG: Bad rss-counter state mm:000000008daaa39e type:MM_FILEPAGES val:33 [ 28.934694] BUG: Bad rss-counter state mm:000000008daaa39e type:MM_ANONPAGES val:22 [ 29.064564] ================================================================== [ 29.065650] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.066816] Read of size 8 at addr ffff88800e26ab38 by task sshd/221 [ 29.067537] [ 29.067749] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.068563] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.069505] Call Trace: [ 29.069808] <TASK> [ 29.070077] dump_stack_lvl+0x91/0xf0 [ 29.070546] print_report+0xcc/0x620 [ 29.071003] ? __virt_addr_valid+0x102/0x340 [ 29.071533] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.072115] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.072704] kasan_report+0xbe/0xf0 [ 29.073160] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.073767] vma_interval_tree_remove+0xc75/0xec0 [ 29.074374] vma_prepare+0xc54/0x11a0 [ 29.074851] __split_vma+0x5af/0x950 [ 29.075324] ? __pfx___split_vma+0x10/0x10 [ 29.075853] ? find_held_lock+0x2c/0x110 [ 29.076380] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.076939] ? lock_is_held_type+0x9f/0x120 [ 29.077504] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.078101] ? mtree_range_walk+0x632/0x900 [ 29.078655] ? mas_walk+0x5c7/0x7c0 [ 29.079124] do_vmi_munmap+0x1f1/0x2b0 [ 29.079617] mmap_region+0x1f9/0x2660 [ 29.080101] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.080613] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.081332] ? __pfx_lock_acquire+0x10/0x10 [ 29.081864] ? __pfx_mmap_region+0x10/0x10 [ 29.082379] ? security_mmap_addr+0x7d/0xa0 [ 29.082886] ? get_unmapped_area+0x1f5/0x3f0 [ 29.083406] do_mmap+0x854/0xf00 [ 29.083824] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.084290] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.084825] ksys_mmap_pgoff+0x3af/0x500 [ 29.085311] do_syscall_64+0x3f/0x90 [ 29.085794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.086408] RIP: 0033:0x7fc04e221d82 [ 29.086840] 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 [ 29.088838] RSP: 002b:00007ffd90e02e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.089697] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc04e221d82 [ 29.090496] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc04d65b000 [ 29.091297] RBP: 00007fc04d65b000 R08: 0000000000000009 R09: 0000000000001000 [ 29.092097] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560cc870a980 [ 29.092920] R13: 00007ffd90e02e60 R14: 00007ffd90e02e90 R15: 00007ffd90e031f0 [ 29.093782] </TASK> [ 29.094073] [ 29.094290] Allocated by task 213: [ 29.094710] kasan_save_stack+0x22/0x50 [ 29.095215] kasan_set_track+0x25/0x30 [ 29.095705] __kasan_slab_alloc+0x59/0x70 [ 29.096224] kmem_cache_alloc+0x16b/0x370 [ 29.096735] vm_area_dup+0x20/0x160 [ 29.097193] __split_vma+0x170/0x950 [ 29.097676] split_vma+0xc6/0x110 [ 29.098112] mprotect_fixup+0x8d2/0xb30 [ 29.098609] do_mprotect_pkey+0x87e/0xd40 [ 29.099127] __x64_sys_mprotect+0x78/0xc0 [ 29.099648] do_syscall_64+0x3f/0x90 [ 29.100118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.100766] [ 29.100980] Freed by task 13: [ 29.101374] kasan_save_stack+0x22/0x50 [ 29.101878] kasan_set_track+0x25/0x30 [ 29.102377] kasan_save_free_info+0x2b/0x50 [ 29.102905] __kasan_slab_free+0x10a/0x190 [ 29.103442] kmem_cache_free+0x10d/0x4d0 [ 29.103945] rcu_core+0x8c8/0x2860 [ 29.104386] __do_softirq+0x1b7/0x7d4 [ 29.104862] [ 29.105079] Last potentially related work creation: [ 29.105687] kasan_save_stack+0x22/0x50 [ 29.106197] __kasan_record_aux_stack+0x8e/0xa0 [ 29.106771] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.107406] remove_vma+0x139/0x170 [ 29.107859] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.108426] do_vmi_munmap+0x1f1/0x2b0 [ 29.108908] __vm_munmap+0x138/0x3a0 [ 29.109382] __x64_sys_munmap+0x59/0x80 [ 29.109863] do_syscall_64+0x3f/0x90 [ 29.110339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.110973] [ 29.111191] Second to last potentially related work creation: [ 29.111866] kasan_save_stack+0x22/0x50 [ 29.112358] __kasan_record_aux_stack+0x8e/0xa0 [ 29.112926] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.113574] remove_vma+0x139/0x170 [ 29.114020] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.114566] do_vmi_munmap+0x1f1/0x2b0 [ 29.115042] mmap_region+0x1f9/0x2660 [ 29.115515] do_mmap+0x854/0xf00 [ 29.115936] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.116425] ksys_mmap_pgoff+0x7d/0x500 [ 29.116899] do_syscall_64+0x3f/0x90 [ 29.117360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.117968] [ 29.118178] The buggy address belongs to the object at ffff88800e26aae0 [ 29.118178] which belongs to the cache vm_area_struct of size 168 [ 29.119646] The buggy address is located 88 bytes inside of [ 29.119646] freed 168-byte region [ffff88800e26aae0, ffff88800e26ab88) [ 29.121095] [ 29.121326] The buggy address belongs to the physical page: [ 29.121984] page:0000000020d1d9fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe26a [ 29.123097] memcg:ffff88800dde1b01 [ 29.123536] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.124204] page_type: 0xffffffff() [ 29.124675] raw: 0100000000000200 ffff8880087a0c80 ffffea000038a2c0 dead000000000004 [ 29.125644] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dde1b01 [ 29.126586] page dumped because: kasan: bad access detected [ 29.127277] [ 29.127499] Memory state around the buggy address: [ 29.128098] ffff88800e26aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.128966] ffff88800e26aa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 29.129862] >ffff88800e26ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.130749] ^ [ 29.131387] ffff88800e26ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.132225] ffff88800e26ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.133076] ================================================================== [ 29.134211] Disabling lock debugging due to kernel taint [ 31.427222] BUG: Bad rss-counter state mm:0000000032e55107 type:MM_FILEPAGES val:33 [ 31.428257] BUG: Bad rss-counter state mm:0000000032e55107 type:MM_ANONPAGES val:22 [ 31.918351] BUG: Bad rss-counter state mm:000000002066bfbf type:MM_FILEPAGES val:33 [ 31.919598] BUG: Bad rss-counter state mm:000000002066bfbf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39701' (ECDSA) to the list of known hosts. 2023/06/20 13:00:32 fuzzer started 2023/06/20 13:00:32 dialing manager at localhost:36067 2023/06/20 13:00:32 checking machine... 2023/06/20 13:00:32 checking revisions... [ 32.639814] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:00:32 testing simple program... [ 32.684257] cgroup: Unknown subsys name 'net' [ 32.734127] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:00:32 Registers: info registers vcpu 0 RAX=1ffffffff0c2712f RBX=0000000000000001 RCX=ffffffff86138976 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff86138978 RBP=ffff888008d9f988 RSP=ffff888008d9f8c0 R8 =ffffffff8613897a R9 =ffff888008d9f970 R10=0000000000038001 R11=0000000000020cbd R12=ffff888008d9f990 R13=ffff888008d9f978 R14=ffff888008d9fd28 R15=ffff888008d9f930 RIP=ffffffff811311c7 RFL=00000212 [----A--] 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 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=00007f122c0f6000 CR3=000000000c9ea000 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=2032333a30303a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a30303a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09d20 RCX=0000000000000002 RDX=1ffff1100d9e1337 RSI=ffff88806cf09d08 RDI=ffff88806cf099b8 RBP=ffff88806cf09d98 RSP=ffff88806cf09940 R8 =0000000000000001 R9 =ffff88806cf099f0 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88806cf09a10 R13=ffff88806cf099f8 R14=ffff88806cf09d08 R15=ffff88806cf099b0 RIP=ffffffff81131c83 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 00007f7f7ee3e900 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=00007ffd8c969000 CR3=000000001b86a000 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