syzkaller login: [ 35.264954] BUG: Bad rss-counter state mm:0000000088eb1e4f type:MM_FILEPAGES val:33 [ 35.266804] BUG: Bad rss-counter state mm:0000000088eb1e4f type:MM_ANONPAGES val:22 [ 35.424376] ================================================================== [ 35.425557] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.426921] Read of size 8 at addr ffff88800de7f968 by task sshd/220 [ 35.427819] [ 35.428060] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.428991] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.430065] Call Trace: [ 35.430402] [ 35.430691] dump_stack_lvl+0x91/0xf0 [ 35.431198] print_report+0xcc/0x620 [ 35.431694] ? __virt_addr_valid+0x102/0x340 [ 35.432267] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.432907] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.433586] kasan_report+0xbe/0xf0 [ 35.434070] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.434706] vma_interval_tree_remove+0xc75/0xec0 [ 35.435329] vma_prepare+0xc54/0x11a0 [ 35.435808] __split_vma+0x5af/0x950 [ 35.436296] ? __pfx___split_vma+0x10/0x10 [ 35.436843] ? find_held_lock+0x2c/0x110 [ 35.437392] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.437965] ? lock_is_held_type+0x9f/0x120 [ 35.438522] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.439136] ? mtree_range_walk+0x632/0x900 [ 35.439696] ? mas_walk+0x5c7/0x7c0 [ 35.440178] do_vmi_munmap+0x1f1/0x2b0 [ 35.440690] mmap_region+0x1f9/0x2660 [ 35.441187] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.441711] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.442456] ? __pfx_lock_acquire+0x10/0x10 [ 35.442986] ? __pfx_mmap_region+0x10/0x10 [ 35.443528] ? security_mmap_addr+0x7d/0xa0 [ 35.444058] ? get_unmapped_area+0x1f5/0x3f0 [ 35.444631] do_mmap+0x854/0xf00 [ 35.445090] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.445597] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.446171] ksys_mmap_pgoff+0x3af/0x500 [ 35.446678] do_syscall_64+0x3f/0x90 [ 35.447155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.447847] RIP: 0033:0x7fea0be5bd82 [ 35.448343] 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 [ 35.450502] RSP: 002b:00007ffd99e52ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.451420] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea0be5bd82 [ 35.452298] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea0b295000 [ 35.453179] RBP: 00007fea0b295000 R08: 0000000000000009 R09: 0000000000001000 [ 35.454031] R10: 0000000000000812 R11: 0000000000000206 R12: 00005607e91eff70 [ 35.454886] R13: 00007ffd99e52ad0 R14: 00007ffd99e52b00 R15: 00007ffd99e52e60 [ 35.455757] [ 35.456049] [ 35.456277] Allocated by task 213: [ 35.456722] kasan_save_stack+0x22/0x50 [ 35.457260] kasan_set_track+0x25/0x30 [ 35.457766] __kasan_slab_alloc+0x59/0x70 [ 35.458309] kmem_cache_alloc+0x16b/0x370 [ 35.458828] vm_area_dup+0x20/0x160 [ 35.459302] __split_vma+0x170/0x950 [ 35.459772] split_vma+0xc6/0x110 [ 35.460225] mprotect_fixup+0x8d2/0xb30 [ 35.460759] do_mprotect_pkey+0x87e/0xd40 [ 35.461291] __x64_sys_mprotect+0x78/0xc0 [ 35.461837] do_syscall_64+0x3f/0x90 [ 35.462343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.462989] [ 35.463221] Freed by task 13: [ 35.463611] kasan_save_stack+0x22/0x50 [ 35.464113] kasan_set_track+0x25/0x30 [ 35.464620] kasan_save_free_info+0x2b/0x50 [ 35.465181] __kasan_slab_free+0x10a/0x190 [ 35.465716] kmem_cache_free+0x10d/0x4d0 [ 35.466240] rcu_core+0x8c8/0x2860 [ 35.466691] __do_softirq+0x1b7/0x7d4 [ 35.467250] [ 35.467471] Last potentially related work creation: [ 35.468070] kasan_save_stack+0x22/0x50 [ 35.468585] __kasan_record_aux_stack+0x8e/0xa0 [ 35.469192] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.469846] remove_vma+0x139/0x170 [ 35.470315] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.470870] do_vmi_munmap+0x1f1/0x2b0 [ 35.471387] __vm_munmap+0x138/0x3a0 [ 35.471856] __x64_sys_munmap+0x59/0x80 [ 35.472362] do_syscall_64+0x3f/0x90 [ 35.472877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.473531] [ 35.473753] The buggy address belongs to the object at ffff88800de7f910 [ 35.473753] which belongs to the cache vm_area_struct of size 168 [ 35.475270] The buggy address is located 88 bytes inside of [ 35.475270] freed 168-byte region [ffff88800de7f910, ffff88800de7f9b8) [ 35.476691] [ 35.476908] The buggy address belongs to the physical page: [ 35.477584] page:0000000004b885ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde7f [ 35.478684] memcg:ffff88800c735001 [ 35.479115] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.479833] page_type: 0xffffffff() [ 35.480310] raw: 0100000000000200 ffff88800879fc80 ffffea0000366cc0 dead000000000007 [ 35.481256] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c735001 [ 35.482174] page dumped because: kasan: bad access detected [ 35.482836] [ 35.483054] Memory state around the buggy address: [ 35.483648] ffff88800de7f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.484522] ffff88800de7f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.485419] >ffff88800de7f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.486282] ^ [ 35.487065] ffff88800de7f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 35.487942] ffff88800de7fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.488832] ================================================================== [ 35.489751] Disabling lock debugging due to kernel taint [ 37.683554] BUG: Bad rss-counter state mm:0000000093502c54 type:MM_FILEPAGES val:33 [ 37.684741] BUG: Bad rss-counter state mm:0000000093502c54 type:MM_ANONPAGES val:22 [ 38.072912] BUG: Bad rss-counter state mm:0000000039bbac95 type:MM_FILEPAGES val:33 [ 38.073897] BUG: Bad rss-counter state mm:0000000039bbac95 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53787' (ECDSA) to the list of known hosts. 2023/06/19 22:28:23 fuzzer started 2023/06/19 22:28:24 dialing manager at localhost:44161 2023/06/19 22:28:24 checking machine... 2023/06/19 22:28:24 checking revisions... [ 38.807089] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:28:24 testing simple program... [ 38.851569] cgroup: Unknown subsys name 'net' [ 38.895667] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:28:19 Registers: info registers vcpu 0 RAX=ffffffff8180c522 RBX=ffffffff813ad420 RCX=ffffffff860d6801 RDX=1ffff110011aff36 RSI=ffffffff8180c522 RDI=ffff888008d7fa20 RBP=ffff888008d7f9f0 RSP=ffff888008d7f950 R8 =ffffffff860d68fa R9 =ffff888008d7f998 R10=0000000000038001 R11=0000000000010b7e R12=ffff888008d7fa20 R13=0000000000000000 R14=ffff888008d70000 R15=ffff88800ea12a00 RIP=ffffffff813ad424 RFL=00000286 [--S--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 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=00007f338fa25618 CR3=000000000df90000 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=563412feff00545000000000000080fe 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=00007fbbcaa76f40 CR3=000000000d5fc000 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=b89cd6437713c293504b09ead0bf1d38 XMM02=ec2efd57dc4c00df000000000011c148 XMM03=1fc5b8652cd57c34000000000011c218 XMM04=26bd62a9b868094f00000000000ae988 XMM05=19e9129bd510f2350000000000133640 XMM06=4fda316b135da52b00000000001334c8 XMM07=e042d86d42eb936e0000000000123ca8 XMM08=1fc5b8652cd57c34000000000011c218 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000