syzkaller login: [ 30.856299] BUG: Bad rss-counter state mm:00000000f0783989 type:MM_FILEPAGES val:33 [ 30.857493] BUG: Bad rss-counter state mm:00000000f0783989 type:MM_ANONPAGES val:22 [ 31.003649] ================================================================== [ 31.004575] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.005508] Read of size 8 at addr ffff88800c649058 by task sshd/221 [ 31.006390] [ 31.006648] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.007519] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.008492] Call Trace: [ 31.008814] [ 31.009097] dump_stack_lvl+0x91/0xf0 [ 31.009587] print_report+0xcc/0x620 [ 31.010072] ? __virt_addr_valid+0x102/0x340 [ 31.010654] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.011273] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.011893] kasan_report+0xbe/0xf0 [ 31.012375] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.013031] vma_interval_tree_remove+0xc75/0xec0 [ 31.013643] vma_prepare+0xc54/0x11a0 [ 31.014128] __split_vma+0x5af/0x950 [ 31.014611] ? __pfx___split_vma+0x10/0x10 [ 31.015146] ? find_held_lock+0x2c/0x110 [ 31.015660] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.016242] ? lock_is_held_type+0x9f/0x120 [ 31.016784] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.017397] ? mtree_range_walk+0x632/0x900 [ 31.017950] ? mas_walk+0x5c7/0x7c0 [ 31.018436] do_vmi_munmap+0x1f1/0x2b0 [ 31.018936] mmap_region+0x1f9/0x2660 [ 31.019416] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.019929] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.020644] ? __pfx_lock_acquire+0x10/0x10 [ 31.021184] ? __pfx_mmap_region+0x10/0x10 [ 31.021718] ? security_mmap_addr+0x7d/0xa0 [ 31.022264] ? get_unmapped_area+0x1f5/0x3f0 [ 31.022843] do_mmap+0x854/0xf00 [ 31.023287] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.023785] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.024356] ksys_mmap_pgoff+0x3af/0x500 [ 31.024869] do_syscall_64+0x3f/0x90 [ 31.025360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.026024] RIP: 0033:0x7fcb0c7c5d82 [ 31.026517] 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 [ 31.028695] RSP: 002b:00007ffe9954e858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.029641] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb0c7c5d82 [ 31.030510] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb0bbff000 [ 31.031379] RBP: 00007fcb0bbff000 R08: 0000000000000009 R09: 0000000000001000 [ 31.032264] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d56ca0db20 [ 31.033125] R13: 00007ffe9954e870 R14: 00007ffe9954e8a0 R15: 00007ffe9954ec00 [ 31.033990] [ 31.034287] [ 31.034526] Allocated by task 214: [ 31.034977] kasan_save_stack+0x22/0x50 [ 31.035505] kasan_set_track+0x25/0x30 [ 31.036006] __kasan_slab_alloc+0x59/0x70 [ 31.036535] kmem_cache_alloc+0x16b/0x370 [ 31.037060] vm_area_dup+0x20/0x160 [ 31.037519] __split_vma+0x170/0x950 [ 31.037997] split_vma+0xc6/0x110 [ 31.038452] mprotect_fixup+0x8d2/0xb30 [ 31.038961] do_mprotect_pkey+0x87e/0xd40 [ 31.039490] __x64_sys_mprotect+0x78/0xc0 [ 31.040016] do_syscall_64+0x3f/0x90 [ 31.040509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.041163] [ 31.041379] Freed by task 19: [ 31.041761] kasan_save_stack+0x22/0x50 [ 31.042269] kasan_set_track+0x25/0x30 [ 31.042788] kasan_save_free_info+0x2b/0x50 [ 31.043335] __kasan_slab_free+0x10a/0x190 [ 31.043881] kmem_cache_free+0x10d/0x4d0 [ 31.044397] rcu_core+0x8c8/0x2860 [ 31.044851] __do_softirq+0x1b7/0x7d4 [ 31.045336] [ 31.045557] Last potentially related work creation: [ 31.046155] kasan_save_stack+0x22/0x50 [ 31.046676] __kasan_record_aux_stack+0x8e/0xa0 [ 31.047258] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.048012] remove_vma+0x139/0x170 [ 31.048469] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.049044] do_vmi_munmap+0x1f1/0x2b0 [ 31.049550] __vm_munmap+0x138/0x3a0 [ 31.050029] __x64_sys_munmap+0x59/0x80 [ 31.050568] do_syscall_64+0x3f/0x90 [ 31.051044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.051683] [ 31.051897] The buggy address belongs to the object at ffff88800c649000 [ 31.051897] which belongs to the cache vm_area_struct of size 168 [ 31.053380] The buggy address is located 88 bytes inside of [ 31.053380] freed 168-byte region [ffff88800c649000, ffff88800c6490a8) [ 31.054808] [ 31.055027] The buggy address belongs to the physical page: [ 31.055702] page:00000000939ac9c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc649 [ 31.056807] memcg:ffff8880146f0201 [ 31.057230] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.057877] page_type: 0xffffffff() [ 31.058334] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.059258] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146f0201 [ 31.060165] page dumped because: kasan: bad access detected [ 31.060829] [ 31.061043] Memory state around the buggy address: [ 31.061648] ffff88800c648f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.062557] ffff88800c648f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.063451] >ffff88800c649000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.064334] ^ [ 31.065090] ffff88800c649080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.065975] ffff88800c649100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.066874] ================================================================== [ 31.067884] Disabling lock debugging due to kernel taint [ 33.614553] BUG: Bad rss-counter state mm:00000000b0bfe79b type:MM_FILEPAGES val:33 [ 33.615825] BUG: Bad rss-counter state mm:00000000b0bfe79b type:MM_ANONPAGES val:22 [ 33.975144] BUG: Bad rss-counter state mm:00000000053f852c type:MM_FILEPAGES val:33 [ 33.976342] BUG: Bad rss-counter state mm:00000000053f852c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38267' (ECDSA) to the list of known hosts. 2023/06/20 02:33:40 fuzzer started 2023/06/20 02:33:40 dialing manager at localhost:44161 2023/06/20 02:33:40 checking machine... 2023/06/20 02:33:40 checking revisions... [ 34.744888] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:33:40 testing simple program... [ 34.795675] cgroup: Unknown subsys name 'net' [ 34.852727] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:33:40 Registers: info registers vcpu 0 RAX=1ffffffff0c11183 RBX=0000000000000002 RCX=ffffffff86088c1a RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff86088c1c RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =ffffffff86088c1e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09b40 R15=ffff88806ce09a98 RIP=ffffffff811311c7 RFL=00000213 [----A-C] 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 00007feb2a0fc900 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=00007feb2a6b3618 CR3=000000000c4c6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f7057e62000 CR3=000000000d89e000 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=3ca82e41c6377dad8946201d63d70835 XMM02=000000000011c5a8ec2efd57dc4c00df XMM03=0000000000123e502fce3d8ccc511fce XMM04=ba63b6be06c463ed00000000000ae988 XMM05=b422ec23cf5bb3830000000000134840 XMM06=c291bd5c70af25b900000000001338e0 XMM07=e042d86d42eb936e00000000001240d0 XMM08=2fce3d8ccc511fce000000000011c608 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000