syzkaller login: [ 30.617076] BUG: Bad rss-counter state mm:0000000016860e2c type:MM_FILEPAGES val:33 [ 30.618135] BUG: Bad rss-counter state mm:0000000016860e2c type:MM_ANONPAGES val:22 [ 30.655525] ================================================================== [ 30.656591] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.657538] Read of size 8 at addr ffff888019ffb140 by task sshd/222 [ 30.658310] [ 30.658524] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.659399] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.660394] Call Trace: [ 30.660721] [ 30.661009] dump_stack_lvl+0x91/0xf0 [ 30.661500] print_report+0xcc/0x620 [ 30.661986] ? __virt_addr_valid+0x102/0x340 [ 30.662553] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.663180] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.663800] kasan_report+0xbe/0xf0 [ 30.664293] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.664913] vma_interval_tree_remove+0xc75/0xec0 [ 30.665522] vma_prepare+0xc54/0x11a0 [ 30.666029] __split_vma+0x5af/0x950 [ 30.666506] ? __pfx___split_vma+0x10/0x10 [ 30.667036] ? find_held_lock+0x2c/0x110 [ 30.667570] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.668162] ? lock_is_held_type+0x9f/0x120 [ 30.668712] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.669337] ? mtree_range_walk+0x632/0x900 [ 30.669893] ? mas_walk+0x5c7/0x7c0 [ 30.670375] do_vmi_munmap+0x1f1/0x2b0 [ 30.670870] mmap_region+0x1f9/0x2660 [ 30.671356] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.671876] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.672603] ? __pfx_lock_acquire+0x10/0x10 [ 30.673141] ? __pfx_mmap_region+0x10/0x10 [ 30.673675] ? security_mmap_addr+0x7d/0xa0 [ 30.674213] ? get_unmapped_area+0x1f5/0x3f0 [ 30.674766] do_mmap+0x854/0xf00 [ 30.675219] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.675718] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.676289] ksys_mmap_pgoff+0x3af/0x500 [ 30.676794] do_syscall_64+0x3f/0x90 [ 30.677273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.677938] RIP: 0033:0x7fc249613d82 [ 30.678418] 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 [ 30.680584] RSP: 002b:00007ffd9cf5c528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.681492] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc249613d82 [ 30.682336] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc248a4d000 [ 30.683374] RBP: 00007fc248a4d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.684235] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b7df01f70 [ 30.685082] R13: 00007ffd9cf5c540 R14: 00007ffd9cf5c570 R15: 00007ffd9cf5c8d0 [ 30.685964] [ 30.686257] [ 30.686472] Allocated by task 215: [ 30.686907] kasan_save_stack+0x22/0x50 [ 30.687417] kasan_set_track+0x25/0x30 [ 30.687938] __kasan_slab_alloc+0x59/0x70 [ 30.688485] kmem_cache_alloc+0x16b/0x370 [ 30.689011] vm_area_dup+0x20/0x160 [ 30.689470] __split_vma+0x170/0x950 [ 30.689934] split_vma+0xc6/0x110 [ 30.690379] mprotect_fixup+0x8d2/0xb30 [ 30.690877] do_mprotect_pkey+0x87e/0xd40 [ 30.691420] __x64_sys_mprotect+0x78/0xc0 [ 30.691948] do_syscall_64+0x3f/0x90 [ 30.692450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.693101] [ 30.693321] Freed by task 215: [ 30.693729] kasan_save_stack+0x22/0x50 [ 30.694235] kasan_set_track+0x25/0x30 [ 30.694735] kasan_save_free_info+0x2b/0x50 [ 30.695266] __kasan_slab_free+0x10a/0x190 [ 30.695820] kmem_cache_free+0x10d/0x4d0 [ 30.696335] rcu_core+0x8c8/0x2860 [ 30.696793] __do_softirq+0x1b7/0x7d4 [ 30.697270] [ 30.697484] Last potentially related work creation: [ 30.698073] kasan_save_stack+0x22/0x50 [ 30.698588] __kasan_record_aux_stack+0x8e/0xa0 [ 30.699159] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.699830] remove_vma+0x139/0x170 [ 30.700293] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.700853] do_vmi_munmap+0x1f1/0x2b0 [ 30.701343] __vm_munmap+0x138/0x3a0 [ 30.701812] __x64_sys_munmap+0x59/0x80 [ 30.702315] do_syscall_64+0x3f/0x90 [ 30.702790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.703434] [ 30.703650] The buggy address belongs to the object at ffff888019ffb0e8 [ 30.703650] which belongs to the cache vm_area_struct of size 168 [ 30.705162] The buggy address is located 88 bytes inside of [ 30.705162] freed 168-byte region [ffff888019ffb0e8, ffff888019ffb190) [ 30.706557] [ 30.706777] The buggy address belongs to the physical page: [ 30.707452] page:000000004d502a57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ffb [ 30.708553] memcg:ffff88800e397901 [ 30.708981] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.709621] page_type: 0xffffffff() [ 30.710072] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.710985] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e397901 [ 30.711907] page dumped because: kasan: bad access detected [ 30.712563] [ 30.712779] Memory state around the buggy address: [ 30.713374] ffff888019ffb000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.714254] ffff888019ffb080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.715133] >ffff888019ffb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.716003] ^ [ 30.716651] ffff888019ffb180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.717527] ffff888019ffb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.718394] ================================================================== [ 30.719550] Disabling lock debugging due to kernel taint [ 32.651631] BUG: Bad rss-counter state mm:000000009d4681c5 type:MM_FILEPAGES val:33 [ 32.652889] BUG: Bad rss-counter state mm:000000009d4681c5 type:MM_ANONPAGES val:22 [ 33.233492] BUG: Bad rss-counter state mm:000000007f69411f type:MM_FILEPAGES val:33 [ 33.234828] BUG: Bad rss-counter state mm:000000007f69411f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42454' (ECDSA) to the list of known hosts. 2023/06/21 06:20:14 fuzzer started 2023/06/21 06:20:15 dialing manager at localhost:36067 2023/06/21 06:20:15 checking machine... 2023/06/21 06:20:15 checking revisions... [ 33.907495] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:20:15 testing simple program... [ 33.958227] cgroup: Unknown subsys name 'net' [ 34.018649] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:20:14 Registers: info registers vcpu 0 RAX=ffff88801bef8fc0 RBX=ffff888019de6c48 RCX=1ffff110033bcd90 RDX=dffffc0000000000 RSI=ffff88801cd8a000 RDI=ffff888019de6c80 RBP=ffff888019de6c58 RSP=ffff888010207638 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88801cd88000 R13=0000000000000000 R14=ffff88800c9e39c8 R15=ffff88800c9e3980 RIP=ffffffff818476aa RFL=00000086 [--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 00007ff944fd5900 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=00007ff94558c618 CR3=000000001aa88000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f9f7ec0dda0 CR3=000000000ca00000 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=0846b79380098fb1234eda181c4ff399 XMM02=2c67c8bc2e329bc3000000000011ddf0 XMM03=fb795ef6d657705600000000001224b8 XMM04=e8870dfc06bf0f2000000000000ae988 XMM05=59d5b690e0af863b0000000000132328 XMM06=6d3b3d3b697383230000000000131190 XMM07=e042d86d42eb936e0000000000122738 XMM08=75631f2018da619e000000000011de50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000