syzkaller login: [ 29.374396] BUG: Bad rss-counter state mm:00000000c05c4456 type:MM_FILEPAGES val:33 [ 29.375296] BUG: Bad rss-counter state mm:00000000c05c4456 type:MM_ANONPAGES val:22 [ 29.545837] ================================================================== [ 29.546933] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.548075] Read of size 8 at addr ffff88800c4eac20 by task sshd/220 [ 29.548931] [ 29.549177] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.550197] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.551304] Call Trace: [ 29.551662] [ 29.552007] dump_stack_lvl+0x91/0xf0 [ 29.552581] print_report+0xcc/0x620 [ 29.553139] ? __virt_addr_valid+0x102/0x340 [ 29.553732] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.554453] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.555203] kasan_report+0xbe/0xf0 [ 29.555709] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.556341] vma_interval_tree_remove+0xc75/0xec0 [ 29.557011] vma_prepare+0xc54/0x11a0 [ 29.557556] __split_vma+0x5af/0x950 [ 29.558072] ? __pfx___split_vma+0x10/0x10 [ 29.558655] ? find_held_lock+0x2c/0x110 [ 29.559212] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.559810] ? lock_is_held_type+0x9f/0x120 [ 29.560382] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.561054] ? mtree_range_walk+0x632/0x900 [ 29.561629] ? mas_walk+0x5c7/0x7c0 [ 29.562130] do_vmi_munmap+0x1f1/0x2b0 [ 29.562701] mmap_region+0x1f9/0x2660 [ 29.563250] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.563852] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.564649] ? __pfx_lock_acquire+0x10/0x10 [ 29.565230] ? __pfx_mmap_region+0x10/0x10 [ 29.565843] ? security_mmap_addr+0x7d/0xa0 [ 29.566464] ? get_unmapped_area+0x1f5/0x3f0 [ 29.567107] do_mmap+0x854/0xf00 [ 29.567626] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.568248] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.568912] ksys_mmap_pgoff+0x3af/0x500 [ 29.569494] do_syscall_64+0x3f/0x90 [ 29.570029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.570777] RIP: 0033:0x7f56c5c48d82 [ 29.571300] 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 [ 29.573817] RSP: 002b:00007ffc0a404388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.574938] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f56c5c48d82 [ 29.575873] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f56c5082000 [ 29.576741] RBP: 00007f56c5082000 R08: 0000000000000009 R09: 0000000000001000 [ 29.577602] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d0aaf2ec0 [ 29.578473] R13: 00007ffc0a4043a0 R14: 00007ffc0a4043d0 R15: 00007ffc0a404730 [ 29.579368] [ 29.579668] [ 29.579885] Allocated by task 212: [ 29.580324] kasan_save_stack+0x22/0x50 [ 29.580834] kasan_set_track+0x25/0x30 [ 29.581340] __kasan_slab_alloc+0x59/0x70 [ 29.581878] kmem_cache_alloc+0x16b/0x370 [ 29.582431] vm_area_dup+0x20/0x160 [ 29.582899] __split_vma+0x170/0x950 [ 29.583386] split_vma+0xc6/0x110 [ 29.583847] mprotect_fixup+0x8d2/0xb30 [ 29.584468] do_mprotect_pkey+0x87e/0xd40 [ 29.585031] __x64_sys_mprotect+0x78/0xc0 [ 29.585632] do_syscall_64+0x3f/0x90 [ 29.586171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.586938] [ 29.587193] Freed by task 212: [ 29.587666] kasan_save_stack+0x22/0x50 [ 29.588259] kasan_set_track+0x25/0x30 [ 29.588823] kasan_save_free_info+0x2b/0x50 [ 29.589352] __kasan_slab_free+0x10a/0x190 [ 29.589869] kmem_cache_free+0x10d/0x4d0 [ 29.590437] rcu_core+0x8c8/0x2860 [ 29.590901] __do_softirq+0x1b7/0x7d4 [ 29.591433] [ 29.591692] Last potentially related work creation: [ 29.592437] kasan_save_stack+0x22/0x50 [ 29.593045] __kasan_record_aux_stack+0x8e/0xa0 [ 29.593804] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.594701] remove_vma+0x139/0x170 [ 29.595318] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.595969] do_vmi_munmap+0x1f1/0x2b0 [ 29.596572] __vm_munmap+0x138/0x3a0 [ 29.597188] __x64_sys_munmap+0x59/0x80 [ 29.597850] do_syscall_64+0x3f/0x90 [ 29.598460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.599272] [ 29.599551] The buggy address belongs to the object at ffff88800c4eabc8 [ 29.599551] which belongs to the cache vm_area_struct of size 168 [ 29.601213] The buggy address is located 88 bytes inside of [ 29.601213] freed 168-byte region [ffff88800c4eabc8, ffff88800c4eac70) [ 29.602631] [ 29.602855] The buggy address belongs to the physical page: [ 29.603493] page:0000000070856c1e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4ea [ 29.604649] memcg:ffff88800cfbfb01 [ 29.605075] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.605787] page_type: 0xffffffff() [ 29.606344] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 29.607289] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfbfb01 [ 29.608209] page dumped because: kasan: bad access detected [ 29.608948] [ 29.609204] Memory state around the buggy address: [ 29.609859] ffff88800c4eab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.610848] ffff88800c4eab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.611802] >ffff88800c4eac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.612856] ^ [ 29.613474] ffff88800c4eac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.614557] ffff88800c4ead00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.615633] ================================================================== [ 29.617046] Disabling lock debugging due to kernel taint [ 31.670361] BUG: Bad rss-counter state mm:0000000007cffe71 type:MM_FILEPAGES val:33 [ 31.671520] BUG: Bad rss-counter state mm:0000000007cffe71 type:MM_ANONPAGES val:22 [ 32.074388] BUG: Bad rss-counter state mm:000000003f6a0013 type:MM_FILEPAGES val:33 [ 32.075620] BUG: Bad rss-counter state mm:000000003f6a0013 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2071' (ECDSA) to the list of known hosts. 2023/06/20 03:25:04 fuzzer started 2023/06/20 03:25:04 dialing manager at localhost:44161 2023/06/20 03:25:04 checking machine... 2023/06/20 03:25:04 checking revisions... [ 32.777283] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:25:04 testing simple program... [ 32.833792] cgroup: Unknown subsys name 'net' [ 32.875697] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:25:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffff888015b575c8 RDX=1ffff11002b6aead RSI=1ffff11002b6aea7 RDI=ffff888015b57528 RBP=ffff888015b57580 RSP=ffff888015b57468 R8 =0000000000000000 R9 =0000000000000000 R10=ffff888015b57528 R11=736573203a296e6f R12=ffff888015b57588 R13=ffff888015b57570 R14=ffff888015b57569 R15=ffff888015b57528 RIP=ffffffff811306da 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 00007f077612b700 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=00007fe77bc8f618 CR3=00000000180e6000 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=2033303a35323a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a35323a3330203032 XMM08=672f6d65747379732f646d6574737973 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff81534376 RDX=ffff888008d751c0 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fce2 RSP=ffff88806cf09e30 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806cf09ff8 R12=ffff88806cf293c0 R13=0000000000000001 R14=0000000000000002 R15=0000000000000001 RIP=ffffffff8180fd28 RFL=00000056 [---ZAP-] 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 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=00007f2d25876000 CR3=0000000013a3c000 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=58df95b826b24cbf924047667a5c28d1 XMM02=000000000011f8f8eff9b2d0a8fce9cb XMM03=000000000011f9c82c67c8bc2e329bc3 XMM04=988d4fc3817f08ad00000000000ae988 XMM05=19e9129bd510f2350000000000133b40 XMM06=3786c94633ce0ed300000000001329a8 XMM07=e042d86d42eb936e0000000000123b28 XMM08=930d327811299ec5000000000011f9c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000