syzkaller login: [ 30.607142] BUG: Bad rss-counter state mm:00000000c0087924 type:MM_FILEPAGES val:33 [ 30.608356] BUG: Bad rss-counter state mm:00000000c0087924 type:MM_ANONPAGES val:22 [ 30.774531] ================================================================== [ 30.775496] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.776441] Read of size 8 at addr ffff8880199d4b38 by task sshd/220 [ 30.777202] [ 30.777543] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.778469] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.779481] Call Trace: [ 30.779800] [ 30.780105] dump_stack_lvl+0x91/0xf0 [ 30.780595] print_report+0xcc/0x620 [ 30.781079] ? __virt_addr_valid+0x102/0x340 [ 30.781630] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782241] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782855] kasan_report+0xbe/0xf0 [ 30.783344] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.783962] vma_interval_tree_remove+0xc75/0xec0 [ 30.784561] vma_prepare+0xc54/0x11a0 [ 30.785036] __split_vma+0x5af/0x950 [ 30.785508] ? __pfx___split_vma+0x10/0x10 [ 30.786027] ? find_held_lock+0x2c/0x110 [ 30.786544] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.787118] ? lock_is_held_type+0x9f/0x120 [ 30.787647] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.788247] ? mtree_range_walk+0x632/0x900 [ 30.788796] ? mas_walk+0x5c7/0x7c0 [ 30.789272] do_vmi_munmap+0x1f1/0x2b0 [ 30.789760] mmap_region+0x1f9/0x2660 [ 30.790232] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.790739] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.791465] ? __pfx_lock_acquire+0x10/0x10 [ 30.791994] ? __pfx_mmap_region+0x10/0x10 [ 30.792534] ? security_mmap_addr+0x7d/0xa0 [ 30.793060] ? get_unmapped_area+0x1f5/0x3f0 [ 30.793605] do_mmap+0x854/0xf00 [ 30.794037] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.794555] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.795148] ksys_mmap_pgoff+0x3af/0x500 [ 30.795672] do_syscall_64+0x3f/0x90 [ 30.796165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.796813] RIP: 0033:0x7fb2acd78d82 [ 30.797271] 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 [ 30.799440] RSP: 002b:00007ffd72192d98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.800374] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb2acd78d82 [ 30.801255] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb2ac1b2000 [ 30.802107] RBP: 00007fb2ac1b2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.802972] R10: 0000000000000812 R11: 0000000000000206 R12: 000056520b333ec0 [ 30.803832] R13: 00007ffd72192db0 R14: 00007ffd72192de0 R15: 00007ffd72193140 [ 30.804703] [ 30.805002] [ 30.805222] Allocated by task 213: [ 30.805662] kasan_save_stack+0x22/0x50 [ 30.806179] kasan_set_track+0x25/0x30 [ 30.806670] __kasan_slab_alloc+0x59/0x70 [ 30.807197] kmem_cache_alloc+0x16b/0x370 [ 30.807713] vm_area_dup+0x20/0x160 [ 30.808168] __split_vma+0x170/0x950 [ 30.808648] split_vma+0xc6/0x110 [ 30.809092] mprotect_fixup+0x8d2/0xb30 [ 30.809601] do_mprotect_pkey+0x87e/0xd40 [ 30.810127] __x64_sys_mprotect+0x78/0xc0 [ 30.810655] do_syscall_64+0x3f/0x90 [ 30.811144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.811786] [ 30.812000] Freed by task 213: [ 30.812391] kasan_save_stack+0x22/0x50 [ 30.812905] kasan_set_track+0x25/0x30 [ 30.813402] kasan_save_free_info+0x2b/0x50 [ 30.813936] __kasan_slab_free+0x10a/0x190 [ 30.814472] kmem_cache_free+0x10d/0x4d0 [ 30.815011] rcu_core+0x8c8/0x2860 [ 30.815458] __do_softirq+0x1b7/0x7d4 [ 30.815933] [ 30.816147] Last potentially related work creation: [ 30.816735] kasan_save_stack+0x22/0x50 [ 30.817242] __kasan_record_aux_stack+0x8e/0xa0 [ 30.817816] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.818523] remove_vma+0x139/0x170 [ 30.818988] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.819546] do_vmi_munmap+0x1f1/0x2b0 [ 30.820039] __vm_munmap+0x138/0x3a0 [ 30.820514] __x64_sys_munmap+0x59/0x80 [ 30.821019] do_syscall_64+0x3f/0x90 [ 30.821502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.822162] [ 30.822376] The buggy address belongs to the object at ffff8880199d4ae0 [ 30.822376] which belongs to the cache vm_area_struct of size 168 [ 30.823858] The buggy address is located 88 bytes inside of [ 30.823858] freed 168-byte region [ffff8880199d4ae0, ffff8880199d4b88) [ 30.825293] [ 30.825511] The buggy address belongs to the physical page: [ 30.826171] page:0000000044cf12fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x199d4 [ 30.827320] memcg:ffff888016fccb01 [ 30.827760] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.828411] page_type: 0xffffffff() [ 30.828870] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.829829] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016fccb01 [ 30.830765] page dumped because: kasan: bad access detected [ 30.831441] [ 30.831661] Memory state around the buggy address: [ 30.832258] ffff8880199d4a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.833128] ffff8880199d4a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.833993] >ffff8880199d4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.834857] ^ [ 30.835495] ffff8880199d4b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.836354] ffff8880199d4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.837209] ================================================================== [ 30.838228] Disabling lock debugging due to kernel taint [ 33.217299] BUG: Bad rss-counter state mm:0000000098c0ee5e type:MM_FILEPAGES val:33 [ 33.218523] BUG: Bad rss-counter state mm:0000000098c0ee5e type:MM_ANONPAGES val:22 [ 33.742961] BUG: Bad rss-counter state mm:00000000a83b1b04 type:MM_FILEPAGES val:33 [ 33.744150] BUG: Bad rss-counter state mm:00000000a83b1b04 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21479' (ECDSA) to the list of known hosts. 2023/06/20 19:53:49 fuzzer started 2023/06/20 19:53:49 dialing manager at localhost:36067 2023/06/20 19:53:49 checking machine... 2023/06/20 19:53:49 checking revisions... [ 34.397345] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:53:50 testing simple program... [ 34.444105] cgroup: Unknown subsys name 'net' [ 34.509860] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:53:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fffe2787b08 CR3=0000000018f64000 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=2039343a33353a3931203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a33353a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b60 RCX=0000000000000001 RDX=1ffff1100d9e136e RSI=ffffffff818a344e RDI=ffff88806cf09b70 RBP=ffff88806cf09b30 RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000237cd R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88800f943680 R15=ffff888010120410 RIP=ffffffff813ad496 RFL=00000296 [--S-AP-] 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 00007f0d3f624900 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=00007fdc81fa0650 CR3=000000000d7aa000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0de399d18b05c1d500000000000ae988 XMM05=3a1c9452257cf9400000000000132768 XMM06=19e9129bd510f2350000000000131620 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000