[ 26.428423] BUG: Bad rss-counter state mm:000000007adeba90 type:MM_FILEPAGES val:33 [ 26.429314] BUG: Bad rss-counter state mm:000000007adeba90 type:MM_ANONPAGES val:22 [ 26.568597] ================================================================== [ 26.569377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.570197] Read of size 8 at addr ffff888019a6ed08 by task sshd/221 [ 26.570913] [ 26.571108] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.571964] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.572817] Call Trace: [ 26.573094] [ 26.573341] dump_stack_lvl+0x91/0xf0 [ 26.573778] print_report+0xcc/0x620 [ 26.574223] ? __virt_addr_valid+0x102/0x340 [ 26.574711] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.575253] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.575807] kasan_report+0xbe/0xf0 [ 26.576212] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.576775] vma_interval_tree_remove+0xc75/0xec0 [ 26.577306] vma_prepare+0xc54/0x11a0 [ 26.577730] __split_vma+0x5af/0x950 [ 26.578155] ? __pfx___split_vma+0x10/0x10 [ 26.578646] ? find_held_lock+0x2c/0x110 [ 26.579095] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.579578] ? lock_is_held_type+0x9f/0x120 [ 26.580049] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.580587] ? mtree_range_walk+0x632/0x900 [ 26.581069] ? mas_walk+0x5c7/0x7c0 [ 26.581487] do_vmi_munmap+0x1f1/0x2b0 [ 26.581924] mmap_region+0x1f9/0x2660 [ 26.582358] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.582812] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.583454] ? __pfx_lock_acquire+0x10/0x10 [ 26.583918] ? __pfx_mmap_region+0x10/0x10 [ 26.584380] ? security_mmap_addr+0x7d/0xa0 [ 26.584844] ? get_unmapped_area+0x1f5/0x3f0 [ 26.585319] do_mmap+0x854/0xf00 [ 26.585696] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.586128] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.586656] ksys_mmap_pgoff+0x3af/0x500 [ 26.587114] do_syscall_64+0x3f/0x90 [ 26.587537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.588101] RIP: 0033:0x7f2783a5cd82 [ 26.588500] 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 [ 26.590348] RSP: 002b:00007ffffb025a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.591127] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2783a5cd82 [ 26.591855] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2782e96000 [ 26.592599] RBP: 00007f2782e96000 R08: 0000000000000009 R09: 0000000000001000 [ 26.593327] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564c6ba18f60 [ 26.594064] R13: 00007ffffb025a70 R14: 00007ffffb025aa0 R15: 00007ffffb025e00 [ 26.594824] [ 26.595094] [ 26.595279] Allocated by task 214: [ 26.595653] kasan_save_stack+0x22/0x50 [ 26.596098] kasan_set_track+0x25/0x30 [ 26.596530] __kasan_slab_alloc+0x59/0x70 [ 26.596986] kmem_cache_alloc+0x16b/0x370 [ 26.597435] vm_area_dup+0x20/0x160 [ 26.597836] __split_vma+0x170/0x950 [ 26.598259] split_vma+0xc6/0x110 [ 26.598663] mprotect_fixup+0x8d2/0xb30 [ 26.599108] do_mprotect_pkey+0x87e/0xd40 [ 26.599563] __x64_sys_mprotect+0x78/0xc0 [ 26.600013] do_syscall_64+0x3f/0x90 [ 26.600418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.600986] [ 26.601171] Freed by task 214: [ 26.601517] kasan_save_stack+0x22/0x50 [ 26.601953] kasan_set_track+0x25/0x30 [ 26.602386] kasan_save_free_info+0x2b/0x50 [ 26.602856] __kasan_slab_free+0x10a/0x190 [ 26.603324] kmem_cache_free+0x10d/0x4d0 [ 26.603768] rcu_core+0x8c8/0x2860 [ 26.604146] __do_softirq+0x1b7/0x7d4 [ 26.604546] [ 26.604729] Last potentially related work creation: [ 26.605259] kasan_save_stack+0x22/0x50 [ 26.605709] __kasan_record_aux_stack+0x8e/0xa0 [ 26.606199] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.606752] remove_vma+0x139/0x170 [ 26.607150] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.607627] do_vmi_munmap+0x1f1/0x2b0 [ 26.608043] __vm_munmap+0x138/0x3a0 [ 26.608450] __x64_sys_munmap+0x59/0x80 [ 26.608887] do_syscall_64+0x3f/0x90 [ 26.609319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.609889] [ 26.610076] The buggy address belongs to the object at ffff888019a6ecb0 [ 26.610076] which belongs to the cache vm_area_struct of size 168 [ 26.611361] The buggy address is located 88 bytes inside of [ 26.611361] freed 168-byte region [ffff888019a6ecb0, ffff888019a6ed58) [ 26.612600] [ 26.612791] The buggy address belongs to the physical page: [ 26.613427] page:0000000055bda98a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a6e [ 26.614388] memcg:ffff88800ba8fd01 [ 26.614771] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.615338] page_type: 0xffffffff() [ 26.615726] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 26.616521] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ba8fd01 [ 26.617296] page dumped because: kasan: bad access detected [ 26.617872] [ 26.618061] Memory state around the buggy address: [ 26.618583] ffff888019a6ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 26.619331] ffff888019a6ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 26.620048] >ffff888019a6ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 26.620744] ^ [ 26.621107] ffff888019a6ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 26.621817] ffff888019a6ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.622544] ================================================================== [ 26.623316] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.370405] BUG: Bad rss-counter state mm:000000009b8d40ba type:MM_FILEPAGES val:33 [ 28.371612] BUG: Bad rss-counter state mm:000000009b8d40ba type:MM_ANONPAGES val:22 [ 28.796329] BUG: Bad rss-counter state mm:000000004b52f156 type:MM_FILEPAGES val:33 [ 28.797549] BUG: Bad rss-counter state mm:000000004b52f156 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21346' (ECDSA) to the list of known hosts. 2023/06/19 12:34:39 fuzzer started 2023/06/19 12:34:40 dialing manager at localhost:44161 2023/06/19 12:34:40 checking machine... 2023/06/19 12:34:40 checking revisions... [ 29.475075] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:34:40 testing simple program... [ 29.527045] cgroup: Unknown subsys name 'net' [ 29.569004] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:34:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff11001b1be96 RSI=ffffffff8180ee7e RDI=ffff88800d8df4b0 RBP=ffff88800d8df548 RSP=ffff88800d8df488 R8 =ffffffff8613751e R9 =ffff88800d8df4f0 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800d8df578 R13=0000000000000000 R14=ffff888015a8d1c0 R15=ffff88800d8df4b0 RIP=ffffffff811305f0 RFL=00000216 [----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 00007f1a890b4900 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=00007f916b7a7650 CR3=000000000c572000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=5302ff74ccaee09e00000000000ae988 XMM05=8f019cf2e4b20e7300000000001345f0 XMM06=c291bd5c70af25b90000000000132da0 XMM07=fb795ef6d65770560000000000123698 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8366cd3b RDX=dffffc0000000000 RSI=ffffffff8366cd3c RDI=ffff8880087ff5a0 RBP=ffff8880087ff5f8 RSP=ffff8880087ff530 R8 =0000000000000001 R9 =ffff8880087ff5e0 R10=0000000000038001 R11=0000000000020c50 R12=ffff8880087ff600 R13=ffff8880087ff5e8 R14=ffff8880087ff5e1 R15=ffff8880087ff5a0 RIP=ffffffff8113071f RFL=00000282 [--S----] 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 00007fb0ee86e900 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=0000563d66191290 CR3=000000000cdaa000 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=6b66722d646d65747379733d74696e75 XMM01=62696c2f7273752f223d657865202264 XMM02=616e696d726574203f3d72646461203f XMM03=79732f646d65747379732f62696c2f72 XMM04=2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e XMM05=0000563d662129300000563d661b1510 XMM06=00000000000000210000000000000000 XMM07=00000000000000000000000000000000 XMM08=63612073253d706f0000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000