KASAN: use-after-free Read in tty_write

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-5.15	KASAN: use-after-free Read in tty_write_room (2)				1	185d	185d	0/3	auto-obsoleted due to no activity on 2024/12/27 00:19
upstream	KASAN: use-after-free Read in tty_write_room serial				12	930d	1188d	0/28	auto-obsoleted due to no activity on 2023/01/01 23:03
linux-6.1	KASAN: use-after-free Read in tty_write_room				2	52d	109d	0/3	upstream: reported on 2024/12/03 11:12
linux-5.15	KASAN: use-after-free Read in tty_write_room				1	520d	520d	0/3	auto-obsoleted due to no activity on 2024/01/27 09:51
upstream	BUG: unable to handle kernel NULL pointer dereference in tty_write_room serial	syz	error		6	634d	691d	0/28	auto-obsoleted due to no activity on 2023/10/05 13:52
upstream	KASAN: slab-use-after-free Read in tty_write_room (2) serial	syz	error	error	124	11h48m	431d	0/28	upstream: reported syz repro on 2024/01/16 15:06
upstream	KASAN: slab-use-after-free Read in tty_write_room serial				1	531d	527d	0/28	auto-obsoleted due to no activity on 2024/01/09 18:18

ieee802154 phy1 wpan1: encryption failed: -22 ================================================================== BUG: KASAN: use-after-free in tty_write_room+0x31/0x80 drivers/tty/tty_ioctl.c:78 Read of size 8 at addr ffff888073758018 by task aoe_tx0/1424 CPU: 1 PID: 1424 Comm: aoe_tx0 Not tainted 5.15.178-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 tty_write_room+0x31/0x80 drivers/tty/tty_ioctl.c:78 handle_tx+0x164/0x620 drivers/net/caif/caif_serial.c:226 __netdev_start_xmit include/linux/netdevice.h:5019 [inline] netdev_start_xmit include/linux/netdevice.h:5033 [inline] xmit_one net/core/dev.c:3617 [inline] dev_hard_start_xmit+0x298/0x7a0 net/core/dev.c:3633 __dev_queue_xmit+0x1c8e/0x32b0 net/core/dev.c:4256 tx+0x65/0x160 drivers/block/aoe/aoenet.c:63 kthread+0x234/0x440 drivers/block/aoe/aoecmd.c:1238 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 </TASK> Allocated by task 25703: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513 kasan_kmalloc include/linux/kasan.h:264 [inline] kmem_cache_alloc_trace+0x143/0x290 mm/slub.c:3247 kmalloc include/linux/slab.h:591 [inline] kzalloc include/linux/slab.h:721 [inline] alloc_tty_struct+0xa5/0x7b0 drivers/tty/tty_io.c:3127 tty_init_dev+0x56/0x4b0 drivers/tty/tty_io.c:1424 ptmx_open+0xdc/0x2c0 drivers/tty/pty.c:824 chrdev_open+0x54a/0x630 fs/char_dev.c:414 do_dentry_open+0x807/0xfb0 fs/open.c:826 do_open fs/namei.c:3608 [inline] path_openat+0x2705/0x2f20 fs/namei.c:3742 do_filp_open+0x21c/0x460 fs/namei.c:3769 do_sys_openat2+0x13b/0x4f0 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1280 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 5324: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x80 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kfree+0xf1/0x270 mm/slub.c:4559 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Last potentially related work creation: kasan_save_stack+0x36/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348 insert_work+0x54/0x3e0 kernel/workqueue.c:1366 __queue_work+0x963/0xd00 kernel/workqueue.c:1532 queue_work_on+0x14b/0x250 kernel/workqueue.c:1559 tty_release_struct+0xb8/0xd0 drivers/tty/tty_io.c:1719 tty_release+0xd53/0x1310 drivers/tty/tty_io.c:1880 __fput+0x3fe/0x8e0 fs/file_table.c:280 task_work_run+0x129/0x1a0 kernel/task_work.c:188 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0x6a3/0x2480 kernel/exit.c:874 do_group_exit+0x144/0x310 kernel/exit.c:996 get_signal+0xc66/0x14e0 kernel/signal.c:2900 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff888073758000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 24 bytes inside of 2048-byte region [ffff888073758000, ffff888073758800) The buggy address belongs to the page: page:ffffea0001cdd600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x73758 head:ffffea0001cdd600 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888017442000 raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2800(GFP_NOWAIT|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 22609, ts 1044025426391, free_ts 1044005143455 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x3b78/0x3d40 mm/page_alloc.c:4192 __alloc_pages+0x272/0x700 mm/page_alloc.c:5465 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xbb/0x4b0 mm/slub.c:1975 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] __kmalloc_node_track_caller+0x1f6/0x390 mm/slub.c:4958 kmalloc_reserve net/core/skbuff.c:356 [inline] pskb_expand_head+0x111/0x1130 net/core/skbuff.c:1709 netlink_trim+0x183/0x220 net/netlink/af_netlink.c:1293 netlink_broadcast_filtered+0x62/0x11a0 net/netlink/af_netlink.c:1498 netlink_broadcast net/netlink/af_netlink.c:1543 [inline] nlmsg_multicast include/net/netlink.h:1033 [inline] nlmsg_notify+0xf7/0x1b0 net/netlink/af_netlink.c:2532 dev_close_many+0x2a6/0x530 net/core/dev.c:1618 unregister_netdevice_many+0x4b0/0x18f0 net/core/dev.c:11078 unregister_netdevice_queue+0x2e6/0x350 net/core/dev.c:11035 unregister_netdevice include/linux/netdevice.h:3012 [inline] nsim_destroy+0x44/0x140 drivers/net/netdevsim/netdev.c:382 __nsim_dev_port_del+0x153/0x1b0 drivers/net/netdevsim/dev.c:1349 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1362 [inline] nsim_dev_reload_destroy+0x15e/0x240 drivers/net/netdevsim/dev.c:1561 nsim_dev_remove+0x59/0x100 drivers/net/netdevsim/dev.c:1577 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317 free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396 do_slab_free mm/slub.c:3487 [inline] ___cache_free+0xe3/0x100 mm/slub.c:3506 qlist_free_all+0x36/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x162/0x180 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] kmem_cache_alloc_node+0x121/0x2c0 mm/slub.c:3256 __alloc_skb+0xdd/0x590 net/core/skbuff.c:415 alloc_skb include/linux/skbuff.h:1162 [inline] nlmsg_new include/net/netlink.h:953 [inline] devlink_port_notify+0x2a/0x170 net/core/devlink.c:1048 devlink_port_unregister+0xab/0x230 net/core/devlink.c:9142 __nsim_dev_port_del+0x181/0x1b0 drivers/net/netdevsim/dev.c:1351 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1362 [inline] nsim_dev_reload_destroy+0x15e/0x240 drivers/net/netdevsim/dev.c:1561 nsim_dev_remove+0x59/0x100 drivers/net/netdevsim/dev.c:1577 __device_release_driver drivers/base/dd.c:1227 [inline] device_release_driver_internal+0x4cb/0x7f0 drivers/base/dd.c:1262 bus_remove_device+0x2e5/0x400 drivers/base/bus.c:531 Memory state around the buggy address: ffff888073757f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888073757f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888073758000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888073758080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888073758100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2025/02/10 00:46	linux-5.15.y	c16c81c81336	ef44b750	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-5-15-kasan	KASAN: use-after-free Read in tty_write_room

Crashes (1):

Assets (help?)