[ 23.768645] BUG: Bad rss-counter state mm:0000000002f5a33b type:MM_FILEPAGES val:33 [ 23.769650] BUG: Bad rss-counter state mm:0000000002f5a33b type:MM_ANONPAGES val:22 [ 23.895904] ================================================================== [ 23.897230] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.897954] Read of size 8 at addr ffff88800c5c6228 by task sshd/219 [ 23.898412] [ 23.898544] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.899064] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.899648] Call Trace: [ 23.899842] [ 23.900014] dump_stack_lvl+0x91/0xf0 [ 23.900307] print_report+0xcc/0x620 [ 23.900601] ? __virt_addr_valid+0x102/0x340 [ 23.900946] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.901320] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.901694] kasan_report+0xbe/0xf0 [ 23.901979] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.902357] vma_interval_tree_remove+0xc75/0xec0 [ 23.902722] vma_prepare+0xc54/0x11a0 [ 23.903007] __split_vma+0x5af/0x950 [ 23.903293] ? __pfx___split_vma+0x10/0x10 [ 23.903609] ? find_held_lock+0x2c/0x110 [ 23.903924] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.904260] ? lock_is_held_type+0x9f/0x120 [ 23.904585] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.904964] ? mtree_range_walk+0x632/0x900 [ 23.905299] ? mas_walk+0x5c7/0x7c0 [ 23.905589] do_vmi_munmap+0x1f1/0x2b0 [ 23.905885] mmap_region+0x1f9/0x2660 [ 23.906172] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.906477] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.906906] ? __pfx_lock_acquire+0x10/0x10 [ 23.907229] ? __pfx_mmap_region+0x10/0x10 [ 23.907552] ? security_mmap_addr+0x7d/0xa0 [ 23.907869] ? get_unmapped_area+0x1f5/0x3f0 [ 23.908206] do_mmap+0x854/0xf00 [ 23.908470] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.908783] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.909122] ksys_mmap_pgoff+0x3af/0x500 [ 23.909423] do_syscall_64+0x3f/0x90 [ 23.909716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.910107] RIP: 0033:0x7f77604d3d82 [ 23.910380] 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 [ 23.911676] RSP: 002b:00007ffda03e5248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.912228] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f77604d3d82 [ 23.912763] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f775f90d000 [ 23.913275] RBP: 00007f775f90d000 R08: 0000000000000009 R09: 0000000000001000 [ 23.913788] R10: 0000000000000812 R11: 0000000000000206 R12: 00005610bbf57ec0 [ 23.914293] R13: 00007ffda03e5260 R14: 00007ffda03e5290 R15: 00007ffda03e55f0 [ 23.914817] [ 23.914994] [ 23.915125] Allocated by task 212: [ 23.915382] kasan_save_stack+0x22/0x50 [ 23.915685] kasan_set_track+0x25/0x30 [ 23.915980] __kasan_slab_alloc+0x59/0x70 [ 23.916294] kmem_cache_alloc+0x16b/0x370 [ 23.916603] vm_area_dup+0x20/0x160 [ 23.916894] __split_vma+0x170/0x950 [ 23.917176] split_vma+0xc6/0x110 [ 23.917442] mprotect_fixup+0x8d2/0xb30 [ 23.917751] do_mprotect_pkey+0x87e/0xd40 [ 23.918065] __x64_sys_mprotect+0x78/0xc0 [ 23.918375] do_syscall_64+0x3f/0x90 [ 23.918659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.919042] [ 23.919169] Freed by task 19: [ 23.919400] kasan_save_stack+0x22/0x50 [ 23.919705] kasan_set_track+0x25/0x30 [ 23.920000] kasan_save_free_info+0x2b/0x50 [ 23.920320] __kasan_slab_free+0x10a/0x190 [ 23.920646] kmem_cache_free+0x10d/0x4d0 [ 23.920949] rcu_core+0x8c8/0x2860 [ 23.921217] __do_softirq+0x1b7/0x7d4 [ 23.921504] [ 23.921634] Last potentially related work creation: [ 23.921989] kasan_save_stack+0x22/0x50 [ 23.922291] __kasan_record_aux_stack+0x8e/0xa0 [ 23.922643] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.923033] remove_vma+0x139/0x170 [ 23.923301] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.923637] do_vmi_munmap+0x1f1/0x2b0 [ 23.923928] __vm_munmap+0x138/0x3a0 [ 23.924207] __x64_sys_munmap+0x59/0x80 [ 23.924506] do_syscall_64+0x3f/0x90 [ 23.924801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.925187] [ 23.925315] The buggy address belongs to the object at ffff88800c5c61d0 [ 23.925315] which belongs to the cache vm_area_struct of size 168 [ 23.926242] The buggy address is located 88 bytes inside of [ 23.926242] freed 168-byte region [ffff88800c5c61d0, ffff88800c5c6278) [ 23.927083] [ 23.927204] The buggy address belongs to the physical page: [ 23.927563] page:000000005f2f417f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5c6 [ 23.928292] memcg:ffff888019d4b901 [ 23.928543] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.928906] page_type: 0xffffffff() [ 23.929155] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.929653] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d4b901 [ 23.930136] page dumped because: kasan: bad access detected [ 23.930490] [ 23.930608] Memory state around the buggy address: [ 23.930921] ffff88800c5c6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.931377] ffff88800c5c6180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 23.931834] >ffff88800c5c6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 23.932288] ^ [ 23.932587] ffff88800c5c6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.933058] ffff88800c5c6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.933513] ================================================================== [ 23.934086] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.848834] BUG: Bad rss-counter state mm:0000000036db62b6 type:MM_FILEPAGES val:33 [ 25.849840] BUG: Bad rss-counter state mm:0000000036db62b6 type:MM_ANONPAGES val:22 [ 26.426997] BUG: Bad rss-counter state mm:0000000085dee668 type:MM_FILEPAGES val:33 [ 26.428194] BUG: Bad rss-counter state mm:0000000085dee668 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56776' (ECDSA) to the list of known hosts. 2023/06/21 04:42:40 fuzzer started 2023/06/21 04:42:41 dialing manager at localhost:36067 2023/06/21 04:42:41 checking machine... 2023/06/21 04:42:41 checking revisions... [ 27.135789] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:42:41 testing simple program... [ 27.191626] cgroup: Unknown subsys name 'net' [ 27.260723] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:42:40 Registers: info registers vcpu 0 RAX=ffffffff85408001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffffffff85407f01 RSI=ffffffff85407f50 RDI=ffff88806ce09aa8 RBP=ffffffff85407f50 RSP=ffff88806ce09a00 R8 =ffffffff864bf1dc R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=0000000000000008 R13=ffffffff85400000 R14=ffffffff85407f58 R15=ffff88806ce09a98 RIP=ffffffff811304ce 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 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=00007ffd379a25a8 CR3=0000000019fe6000 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=2030343a32343a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a32343a3430203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff813782c0 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88806cf09e68 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=1ffff1100d9e7479 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=0000000000000001 R15=ffff8880069087a0 RIP=ffffffff813782c8 RFL=00000247 [---Z-PC] 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 00007f2bcca08900 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=00007f2bccfbf618 CR3=000000000ca16000 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=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