ci2 starts bisection 2023-04-12 03:21:31.177890356 +0000 UTC m=+42794.654470888 bisecting fixing commit since ceaa837f96adb69c0df0397937cd74991d5d821a building syzkaller on 957959cbd5c40f4e7be0c363495e34454cd2fde6 ensuring issue is reproducible on original commit ceaa837f96adb69c0df0397937cd74991d5d821a testing commit ceaa837f96adb69c0df0397937cd74991d5d821a gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 85f36966af4b25205d7f7c93b7889c9e3e67db962520b16b893977f78be2b790 run #0: crashed: INFO: trying to register non-static key in copy_net_ns run #1: crashed: INFO: trying to register non-static key in copy_net_ns run #2: crashed: unregister_netdevice: waiting for DEV to become free run #3: crashed: unregister_netdevice: waiting for DEV to become free run #4: crashed: unregister_netdevice: waiting for DEV to become free run #5: crashed: unregister_netdevice: waiting for DEV to become free run #6: crashed: INFO: trying to register non-static key in copy_net_ns run #7: crashed: unregister_netdevice: waiting for DEV to become free run #8: crashed: unregister_netdevice: waiting for DEV to become free run #9: crashed: unregister_netdevice: waiting for DEV to become free run #10: crashed: unregister_netdevice: waiting for DEV to become free run #11: crashed: unregister_netdevice: waiting for DEV to become free run #12: crashed: unregister_netdevice: waiting for DEV to become free run #13: crashed: unregister_netdevice: waiting for DEV to become free run #14: crashed: unregister_netdevice: waiting for DEV to become free run #15: crashed: unregister_netdevice: waiting for DEV to become free run #16: crashed: unregister_netdevice: waiting for DEV to become free run #17: crashed: unregister_netdevice: waiting for DEV to become free run #18: crashed: unregister_netdevice: waiting for DEV to become free run #19: crashed: unregister_netdevice: waiting for DEV to become free testing current HEAD e62252bc55b6d4eddc6c2bdbf95a448180d6a08d testing commit e62252bc55b6d4eddc6c2bdbf95a448180d6a08d gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: e12433e1afe2845373cb2930e907ba0299f94d389547bf7205a00e9d9b8fdcb9 run #0: crashed: KASAN: slab-use-after-free Read in ext4_group_desc_csum run #1: crashed: KASAN: slab-use-after-free Read in ext4_group_desc_csum run #2: crashed: KASAN: slab-out-of-bounds Read in ext4_group_desc_csum run #3: crashed: KASAN: slab-out-of-bounds Read in ext4_group_desc_csum run #4: crashed: KASAN: slab-out-of-bounds Read in ext4_group_desc_csum run #5: crashed: KASAN: use-after-free Read in ext4_group_desc_csum run #6: crashed: KASAN: slab-out-of-bounds Read in ext4_group_desc_csum run #7: crashed: KASAN: use-after-free Read in ext4_group_desc_csum run #8: crashed: KASAN: slab-use-after-free Read in ext4_group_desc_csum run #9: crashed: KASAN: slab-use-after-free Read in ext4_group_desc_csum revisions tested: 2, total time: 50m17.18029273s (build: 38m8.706242271s, test: 10m2.188697856s) the crash still happens on HEAD commit msg: Merge tag 'pci-v6.3-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci crash: KASAN: slab-use-after-free Read in ext4_group_desc_csum ================================================================== BUG: KASAN: slab-use-after-free in crc16+0x1b4/0x220 lib/crc16.c:58 Read of size 1 at addr ffff888026971000 by task syz-executor.2/7708 CPU: 1 PID: 7708 Comm: syz-executor.2 Not tainted 6.3.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x167/0x220 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:319 [inline] print_report+0x163/0x540 mm/kasan/report.c:430 kasan_report+0x176/0x1b0 mm/kasan/report.c:536 crc16+0x1b4/0x220 lib/crc16.c:58 ext4_group_desc_csum+0x863/0xc20 fs/ext4/super.c:3189 ext4_group_desc_csum_set+0x13a/0x1d0 fs/ext4/super.c:3212 ext4_mb_clear_bb fs/ext4/mballoc.c:6027 [inline] ext4_free_blocks+0x14b0/0x23f0 fs/ext4/mballoc.c:6173 ext4_remove_blocks fs/ext4/extents.c:2527 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2710 [inline] ext4_ext_remove_space+0x1e96/0x44c0 fs/ext4/extents.c:2958 ext4_ext_truncate+0x135/0x180 fs/ext4/extents.c:4416 ext4_truncate+0x933/0xd60 fs/ext4/inode.c:4342 ext4_evict_inode+0x925/0xda0 fs/ext4/inode.c:286 evict+0x262/0x550 fs/inode.c:665 do_unlinkat+0x4ae/0x870 fs/namei.c:4323 __do_sys_unlink fs/namei.c:4364 [inline] __se_sys_unlink fs/namei.c:4362 [inline] __x64_sys_unlink+0x44/0x50 fs/namei.c:4362 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f6d8588c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6d86604168 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 00007f6d859ac120 RCX: 00007f6d8588c0f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000 RBP: 00007f6d858e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff28a0bc8f R14: 00007f6d86604300 R15: 0000000000022000 Allocated by task 5551: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:769 slab_alloc_node mm/slub.c:3452 [inline] kmem_cache_alloc_node+0x157/0x350 mm/slub.c:3497 __alloc_skb+0x11e/0x3b0 net/core/skbuff.c:596 alloc_skb include/linux/skbuff.h:1277 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1211 [inline] netlink_sendmsg+0x5ec/0xb50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg net/socket.c:747 [inline] ____sys_sendmsg+0x4aa/0x780 net/socket.c:2501 ___sys_sendmsg net/socket.c:2555 [inline] __sys_sendmsg+0x21a/0x2d0 net/socket.c:2584 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 5551: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:521 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook mm/slub.c:1807 [inline] slab_free mm/slub.c:3787 [inline] kmem_cache_free+0x297/0x520 mm/slub.c:3809 netlink_unicast_kernel net/netlink/af_netlink.c:1340 [inline] netlink_unicast+0x5d2/0x830 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x7a0/0xb50 net/netlink/af_netlink.c:1942 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg net/socket.c:747 [inline] ____sys_sendmsg+0x4aa/0x780 net/socket.c:2501 ___sys_sendmsg net/socket.c:2555 [inline] __sys_sendmsg+0x21a/0x2d0 net/socket.c:2584 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888026971000 which belongs to the cache skbuff_head_cache of size 232 The buggy address is located 0 bytes inside of freed 232-byte region [ffff888026971000, ffff8880269710e8) The buggy address belongs to the physical page: page:ffffea00009a5c40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x26971 anon flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffff888144934500 ffffea0000742200 dead000000000005 raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 5084, tgid 5084 (kworker/1:3), ts 109462978869, free_ts 103373748902 prep_new_page mm/page_alloc.c:2553 [inline] get_page_from_freelist+0x3246/0x33c0 mm/page_alloc.c:4326 __alloc_pages+0x255/0x670 mm/page_alloc.c:5592 alloc_slab_page+0x6a/0x160 mm/slub.c:1851 allocate_slab mm/slub.c:1998 [inline] new_slab+0x84/0x2f0 mm/slub.c:2051 ___slab_alloc+0xa85/0x10a0 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] kmem_cache_alloc_node+0x1f3/0x350 mm/slub.c:3497 __alloc_skb+0x11e/0x3b0 net/core/skbuff.c:596 alloc_skb include/linux/skbuff.h:1277 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:751 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:808 [inline] nsim_dev_trap_report_work+0x297/0xa10 drivers/net/netdevsim/dev.c:853 process_one_work+0x797/0xe20 kernel/workqueue.c:2390 worker_thread+0x8c9/0xfd0 kernel/workqueue.c:2537 kthread+0x232/0x2b0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1454 [inline] free_pcp_prepare mm/page_alloc.c:1504 [inline] free_unref_page_prepare+0xe2f/0xe70 mm/page_alloc.c:3388 free_unref_page+0x37/0x3f0 mm/page_alloc.c:3483 kasan_depopulate_vmalloc_pte+0x6a/0x80 mm/kasan/shadow.c:427 apply_to_pte_range mm/memory.c:2578 [inline] apply_to_pmd_range mm/memory.c:2622 [inline] apply_to_pud_range mm/memory.c:2658 [inline] apply_to_p4d_range mm/memory.c:2694 [inline] __apply_to_page_range+0x765/0x8c0 mm/memory.c:2728 kasan_release_vmalloc+0x9a/0xb0 mm/kasan/shadow.c:544 __purge_vmap_area_lazy+0x1293/0x1500 mm/vmalloc.c:1767 drain_vmap_area_work+0x3b/0xc0 mm/vmalloc.c:1800 process_one_work+0x797/0xe20 kernel/workqueue.c:2390 worker_thread+0x8c9/0xfd0 kernel/workqueue.c:2537 kthread+0x232/0x2b0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffff888026970f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888026970f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888026971000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888026971080: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ffff888026971100: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ==================================================================